I hooked up Nebora with 10 Resurrect scrolls to make math easier. She sells them for 100 gold each to Sebille, so that's 1000 gold for the stack. I'm just laying out math here at this point.
1 Persuasion = 5 points of Influence.
The Red Prince has 3 Persuasion and therefore 15 Influence, but 0 Bartering, and he sees the stack as 970 gold. From there I can determine that:
1 Influence = 0.2% reduction on the vendor base price.
So, if the influence is applied the same way, I can just multiply that by 2.5 to get how it affects the base value:
1 Influence = 0.5% reduction on the base value.
So, 1 Persuasion = 2.5% reduction on the base value.
So, the painting at a base value of 60 would get 1.5 gold off from Lohse's Persuasion. So, that, combined with the 18 we take off from bartering gives us 19.5 off. Then the result is rounded up.
