Formula

CommonFun.calcTradeTax

function CommonFun.calcTradeTax(price)
  local tax = 9
  if price <= 1000000 then
    return 9
  elseif price <= 5000000 then
    return 10
  elseif price <= 10000000 then
    return 11
  elseif price <= 25000000 then
    return 12
  elseif price <= 50000000 then
    return 13
  elseif price <= 100000000 then
    return 14
  else
    return 15
  end
end