Formula
CommonFun.calcTradeBackMoneyPer
function CommonFun.calcTradeBackMoneyPer(srcUser)
if srcUser == nil then
return 0
end
local skilllv_1 = srcUser:GetLernedSkillLevel(273_LORD_KNIGHT:SKIN_A_FLINT)
local A = skilllv_1 * 0.2 - 0.1
if A <= 0 then
A = 0
end
return A
end