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