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{{rewrite|reason=Cleanup, readability/formatting, format standardization}}{{Verified|1.2.2900}}{{Stat
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{{Stub}}{{Verified|1.2.2900}}{{Stat
 
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==Factors==
 
==Factors==
 
{{Stub|section=1|reason=Needs analysis of exactly what order of operations is used for each additional factor. E.g. does the reader multiply the +18% from the inspiration?}}
 
{{Stub|section=1|reason=Needs analysis of exactly what order of operations is used for each additional factor. E.g. does the reader multiply the +18% from the inspiration?}}
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TPI is affected by the following:
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It is is affected by the following:
 
*[[Skills#Social|Social]][[Skill::Social| ]]: [[Skill Base Factor::0|0%]] plus [[Skill Bonus Factor::0.015|1.5]]% per skill level.
 
*[[Skills#Social|Social]][[Skill::Social| ]]: [[Skill Base Factor::0|0%]] plus [[Skill Bonus Factor::0.015|1.5]]% per skill level.
 
*[[Talking]]: [[Talking Importance::0.9|90%]] weight, allowed defect of 0.05 and a max at [[Talking Limit::1|100%]], meaning improvement over 95% does not affect trade prices.
 
*[[Talking]]: [[Talking Importance::0.9|90%]] weight, allowed defect of 0.05 and a max at [[Talking Limit::1|100%]], meaning improvement over 95% does not affect trade prices.
 
*[[Hearing]]: [[Hearing Importance::0.9|90%]] weight, allowed defect of 0.20 and a max at [[Hearing Limit::1|100%]], meaning improvement over 80% does not affect trade prices.
 
*[[Hearing]]: [[Hearing Importance::0.9|90%]] weight, allowed defect of 0.20 and a max at [[Hearing Limit::1|100%]], meaning improvement over 80% does not affect trade prices.
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* Upon installing a [[Psychic reader]]{{RoyaltyIcon}} on a pawn, the pawn's TPI increased by 10% of its current value, multiplied by the pawn's [[Psychic Sensitivity]]. That is, a pawn with Psychic Sensitivity of 100%, Social 20 and a resulting 30% TPI would have a TPI of 33% after installing the Reader, while this would be increased to 36% if they had 200% Psychic Sensitivity. To calculate your TPI from [[Psychic reader]]: Social skill level*0.015*0.1*[[Psychic Sensitivity]].
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* +18% from [[Mental inspiration#Inspired trade|Inspired trade]]
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* [[Ideoligion#Drug use|Drug Use: Essential]] precept {{IdeologyIcon}} provides a +10% TPI only for selling drugs. Only [[Drugs|social and hard drugs]] are affected, medical drugs like [[Luciferium]] and [[Penoxycyline]] do not receive the TPI improvement. Flat bonus, cannot be modified or modify other bonuses.
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* Upon installing [[Psychic reader]] {{RoyaltyIcon}} on a pawn, the pawn's T.P.I. increased by 10% of its current value, multiplied by the pawn's [[Psychic Sensitivity]]. That is, a pawn with Psychic Sensitivity of 100%, Social 20 and a resulting 30% T.P.I. would have a T.P.I. of 33% after installing the Reader, while this would be increased to 36% if they had 200% Psychic Sensitivity.
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* [[Ideoligion#Meme-specific|Ranching: Central]] precept {{IdeologyIcon}} provides a +10% TPI only for selling animal products. Despite saying "animal products", this TPI change applies only to meat, leather and wool. Eggs (fertilized or not), milk and insect jelly are not affected, while both human meat and human leather are. Live animals are not affected. Flat bonus, cannot be modified or modify other bonuses.
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* Giving the [[Ideoligion#Leaders|leader role]] {{IdeologyIcon}} to a pawn provide a 2% T.P.I. improvement.
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* Giving the [[Ideoligion#Leaders|leader role]] {{IdeologyIcon}} to a pawn provides a +2% TPI. Flat bonus, cannot be modified or modify other bonuses.
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* Trading with others [[faction]]’s settlement via [[caravan]] provide a 2% T.P.I. improvement.
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* Trading with others [[faction]]’s settlement via [[caravan]] provides a +2% TPI. Flat bonus, cannot be modified or modify other bonuses.
 
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* [[Mental inspiration#Inspired trade|Inspired trade]] provides a +18% TPI. Flat bonus, cannot be modified or modify other bonuses.
 
  
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TPI is not affected by pawn beauty, nor [[Social Impact]] buffs such as from the [[bowler hat]].
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It is not affected by pawn beauty, nor [[Social Impact]] buffs such as from the [[bowler hat]].
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The formula for calculating the buy price modifier(i.e the percentage of the item's value you will pay) is {{math|1= ''buy price modifier = 60%*(100%+TPI)''}}.The equivalent formula for the sell price modifier is {{math|1= ''buy price modifier = 140%*(100%-TPI)''}}.
 
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<ref name=":1">Note that the actual sell price will be lower than what is listed because the sell price of an item cannot be larger than its buy price.</ref>
 
  
 
{| class="wikitable"
 
{| class="wikitable"
 
|-
 
|-
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! Social Skill !! TPI !! Sell Price !! Buy Price
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! Social Skill !! T.P.I. !! Sell Price !! Buy Price
 
|-
 
|-
 
| 0 || 0.0% || {{#expr: 0.6*(100+0)}}% || {{#expr: 1.4*(100-0)}}%
 
| 0 || 0.0% || {{#expr: 0.6*(100+0)}}% || {{#expr: 1.4*(100-0)}}%
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| 19 || 28.5% || {{#expr: 0.6*(100+28.5)}}% || {{#expr: 1.4*(100-28.5)}}%
 
| 19 || 28.5% || {{#expr: 0.6*(100+28.5)}}% || {{#expr: 1.4*(100-28.5)}}%
 
|-
 
|-
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| 20 || 30.0% || {{#expr: 0.6*(100+30.0)}}% || {{#expr: 1.4*(100-30.0)}}%
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| 20 || 30.0% || {{#expr: 0.6*(100+30)}}% || {{#expr: 1.4*(100-30)}}%
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|-
 
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| 21 || 31.5% || {{#expr: 0.6*(100+31.5)}}% || {{#expr: 1.4*(100-31.5)}}%
 
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|-
 
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| 22 || 33.0% || {{#expr: 0.6*(100+33.0)}}% || {{#expr: 1.4*(100-33.0)}}%
 
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|-
 
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| 23 || 34.5% || {{#expr: 0.6*(100+34.5)}}% || {{#expr: 1.4*(100-34.5)}}%
 
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|-
 
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| 24 || 36.0% || {{#expr: 0.6*(100+36.0)}}% || {{#expr: 1.4*(100-36.0)}}%
 
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|-
 
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| 25 || 37.5% || {{#expr: 0.6*(100+37.5)}}% || {{#expr: 1.4*(100-37.5)}}%
 
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|-
 
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| 26 || 39.5% || {{#expr: 0.6*(100+39.5)}}% || {{#expr: 1.4*(100-39.5)}}%
 
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|-
 
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| 27 || 41.0% || {{#expr: 0.6*(100+41.0)}}%<ref name=":1"/> || {{#expr: 1.4*(100-41.0)}}%
 
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|-
 
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| 28 || 43.0% || {{#expr: 0.6*(100+43.0)}}%<ref name=":1"/> || {{#expr: 1.4*(100-43.0)}}%
 
 
|}
 
|}
  
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{{reflist}}
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==Trade Price Improvement Milestones==
 +
The list below shows the milestones of T.P.I.:
 +
*The minimum T.P.I. a pawn can have is 0%
 +
*Without [[DLC]]s the maximum T.P.I. a pawn can have is 32% with a [[Skills#Social|Social]][[Skill::Social| ]] skill of 20 and trading with another [[faction]]’s settlement.
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*A T.P.I. of 40% is the maximum value you should aim for selling stuff since the game prevents the selling price from being higher than the purchase price, so a higher T.P.I. than 40% mean selling for less. (This is the point where the selling price is equal to the buying price, 84% of the market value)
 +
*A T.P.I. of 46.23% is the highest value you can reach in the game with [[DLC]]s. To achieve this value you need a pawn with [[Skills#Social|Social]] skill of 20, the [[Ideology_(DLC)#Social_roles|leader role]], the [[Traits#Psychic_Sensitivity| Psychically Hypersensitive]] trait, the implants [[Psychic sensitizer]] and [[Psychic reader]], a Legendary [[Eltex staff]], [[Eltex skullcap]], [[Eltex robe]], [[Eltex vest]] and [[Eltex shirt]] and go on a [[caravan]] to trade with a settlement.
 +
*A T.P.I. higher than 100% is useless since the minimum buying price is $0.50.
  
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== How to calculate TPI ==
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==Maximizing Trade Price Improvement==
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The TPI is calculated as follow:
 
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*Base value: 100%
 
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*[[Skills#Social|Social]][[Skill::Social| ]]: *(Skill level*1.5)%
 
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*[[Talking]]: if inferior at 95%: *(Talking ability with 90% weight)% | else: *100%
 
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*[[Hearing]]: if inferor at 80%: *(Hearing ability with 90% weight)% | else: *100%
 
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*If has a [[psychic reader]]: *(10%*[[psychic sensitivity]])
 
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*If has [[Mental_inspiration#Inspired_trade|Inspired trade]]: +18%
 
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*If is colony [[Ideoligion#Leaders|leader]]: +2%
 
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*If trade with settlement: +2%
 
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*If relevant precept: +10% (selling only)
 
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To use this calculation, convert the % value of the game by multiplying it by 0.01.
 
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The calculation for TPI is : [SL]*1.5*(1*(0.1+0.9*([T]/0.95))*(1*(0.1+0.9*[H]/0.8)*(1+(0.1*[PS]))+[IT]+[L]+[TS]+[P]
 
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Multiply by 100 if the value is wanted in %.
 
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{| class="wikitable"
 
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|-
 
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! Variable || SL || T || H || PS || IT || L || S || P
 
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|-
 
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| Meaning || Social Level || Talking Ability || Hearing Ability || Psychic Sensitivity || Inspired Trade || Leader || Trade with Settlement || Precept
 
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|-
 
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| Used If || Always || Has T<95% else 0.95 || Has H<80% else 0.8 || Has psychic reader || Has inspired trade || Is leader || Is trading with settlement || Has relevant precept and is selling
 
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|}
 
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== Trade Price Improvement Milestones ==
 
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The list below shows the milestones of TPI:
 
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*The minimum TPI a pawn can have is 0%.
 
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*A TPI of 40% is the maximum value you should aim for selling stuff since the game prevents the selling price from being higher than the purchase price, so a higher TPI than 40% means selling for less. (This is the point where the selling price is equal to the buying price, 84% of the market value.)
 
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*Without [[DLC]]s the maximum TPI a pawn can have is 50% by having a [[Skills#Social|Social]][[Skill::Social| ]] skill of 20 (+30%), a [[Mental_inspiration#Inspired_trade|Inspired trade]] (+18%) and trading with another [[faction]]’s settlement (+2%).
 
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*A TPI of 64.23% is the highest value you can reach in the game with [[DLC]]s. To achieve this value you need a pawn with [[Skills#Social|Social]] skill of 20 (+30%), a [[Mental_inspiration#Inspired_trade|Inspired trade]] (+18%), the [[Ideology_(DLC)#Social_roles|leader role]] (+2%), the implants [[Psychic reader]] (+3%) and [[Psychic sensitizer]] (+0.75%), the [[Psychically hypersensitive]] (+2.4%) trait, a Legendary [[Eltex staff]] (+2.25%), [[Eltex skullcap]] (+1.8%), [[Eltex robe]] (+0.9%), [[Eltex vest]] (+0.69%) and [[Eltex shirt]] (+0.45%) and go on a [[caravan]] to trade with a settlement (+2%).
 
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*A TPI higher than 100% is useless since the minimum buying price is $0.50.
 
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== Maximizing Trade Price Improvement ==
 
 
The Trade Price Improvement can only be maximize by installing [[Psychic reader]] on your pawn and improving it's [[Psychic Sensitivity]] since you are stuck at 30% with only the [[Skills#Social|Social]] skill.
 
The Trade Price Improvement can only be maximize by installing [[Psychic reader]] on your pawn and improving it's [[Psychic Sensitivity]] since you are stuck at 30% with only the [[Skills#Social|Social]] skill.
  
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An easy way to get to 40% TPI is to use a pawn with a [[Skills#Burning|burning passion]] for [[Skills#Social|Social]] and the [[Psychically hypersensitive]] trait. Then you need to assign this pawn as your [[Ideology_(DLC)#Social_roles|leader]] and buy/find a [[Psychic sensitizer]], a [[Psychic reader]], a good [[Eltex staff]] and an excellent [[Eltex shirt]] to get exactly 40% TPI at a [[Skills#Social|Social]] skill of 20.
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An easy way to get to 40% T.P.I. is to use a pawn with a [[Skills#Burning|burning passion]] for [[Skills#Social|Social]] and the [[Traits#Psychic_Sensitivity| Psychically Hypersensitive]] trait. Then you need to assign this pawn as your [[Ideology_(DLC)#Social_roles|leader]] and buy/find a [[Psychic sensitizer]], a [[Psychic reader]], a good [[Eltex staff]] and an excellent [[Eltex shirt]] to get exactly 40% T.P.I at a [[Skills#Social|Social]] skill of 20.
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Getting a TPI of 40% with a [[Skills#Social|Social]] skill lower than 20 is really difficult, as example a pawn with a [[Skills#Social|Social]] skill of 18 need the [[Ideology_(DLC)#Social_roles|leader role]], the [[Psychically hypersensitive]] trait, the implants [[Psychic sensitizer]] and [[Psychic reader]], a Legendary [[Eltex staff]], [[Eltex skullcap]], [[Eltex robe]], [[Eltex vest]] and [[Eltex shirt]] to get exactly 40% TPI.
 
  
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With the [[Ideoligion#Drug use|Drug Use: Essential]] precept or [[Ideoligion#Meme-specific|Ranching: Central]] precept, you can technically sell items at a TPI higher than 40% since there +10% TPI are not counted toward the "selling price not being higher than the buying price" cap. Even if a TPI of 50% is unreachable because maths, a TPI of 47% is achievable and shoud be aim for as it is the new equilibrium between the buying and selling prices. This 47% TPI is achievable by geting a colonist to a TPI of 37%, by using informations of this page, and trading items affected by the precept of your Ideoligy.
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Get a T.P.I. of 40% whit a [[Skills#Social|Social]] skill lower than 20 is really difficult, as example a pawn with a [[Skills#Social|Social]] skill of 18 need the [[Ideology_(DLC)#Social_roles|leader role]], the [[Traits#Psychic_Sensitivity| Psychically Hypersensitive]] trait, the implants [[Psychic sensitizer]] and [[Psychic reader]], a Legendary [[Eltex staff]], [[Eltex skullcap]], [[Eltex robe]], [[Eltex vest]] and [[Eltex shirt]] to get exactly 40% T.P.I..
  
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If you manage to get a TPI higher than 40% you can literally get everything [[Trade|traders]] have for free. As an example, all [[Trade|traders]] buy [[Insect jelly]], so you can sell it for $6.72 a piece at 40% TPI then buy it back at $6.50 a piece with a TPI of 42%.
+
If you manage to get a T.P.I. higher than 40% you can literally get everything [[Trade|traders]] haves for free. As an example, all [[Trade|traders]] buy [[Insect jelly]], so you can sold it for $6.72 a piece at 40% T.P.I. then buy it back at $6.50 a piece with a T.P.I. of 42%.
  
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== Numbers in Trades ==
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==Numbers in Trades==
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When you trade, your TPI in the top left corner is rounded to the nearest integer. To see the real TPI that is used for calculation, check the information tab of the pawn.
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When you trade, your T.P.I. in the top left corner is rounded to the nearest integer. To see the reel T.P.I., that is use for calculation, go in the information tab of the pawn.
  
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When trading with others [[faction]]’s settlement, the TPI in the top left corner will not include the 2% TPI improvement for this type of transaction despite being correctly count.
+
When trading with others [[faction]]’s settlement, the T.P.I. in the top left corner will not include the 2% T.P.I. improvement for this type of transaction despite being correctly count.
  
 
The price of items shows went trading in rounded to the nearest integer or the second decimal if the price in lower than $10, but the exact value is use for the total price calculation. For example buying [[Insect jelly]] with a [[Skills#Social|Social]] skill of 0 will show a price of $11 even if the game use the exact price (8*1.4=$11.20) so buying 3 [[Insect jelly]] will cost $34 instead of $33 as the total price of a trade is always rounded to the nearest integer.
 
The price of items shows went trading in rounded to the nearest integer or the second decimal if the price in lower than $10, but the exact value is use for the total price calculation. For example buying [[Insect jelly]] with a [[Skills#Social|Social]] skill of 0 will show a price of $11 even if the game use the exact price (8*1.4=$11.20) so buying 3 [[Insect jelly]] will cost $34 instead of $33 as the total price of a trade is always rounded to the nearest integer.
  
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== Version history ==
 
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* [[Version/0.17.1546|0.17.1546]] - spread made much wider, but social skill also has a much greater effect on it.
 
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* [[Version/1.1.0|1.1.0]] - Trade price improvement from negotiator is now reported on the trade screen.
 
 
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