商标注册费用怎么计算的

//golang 算法
//商标注册费率规则
type TmRegisterFeeRule struct {
	//项目基础费用
	ItemBasisFee float32
	//免费项数量
	FreeItemAmount int
	//项多出费用
	ItemExtraFee float32
}

func main() {
	var TmTemp TmRegisterFeeRule
	TmTemp.ItemBasisFee = 300.00
	TmTemp.FreeItemAmount = 10
	TmTemp.ItemExtraFee = 30.00
	var (
		//注册数量
		registerItemAmount int = 1
		//注册项目数组
		registerItemArray map[int]map[int]string
		//结算费用
		calcFee float32 = 0.0
	)
	registerItemArray = make(map[int]map[int]string)
	for i := 0; i <= Common.RandInt(1, 10); i++ {
		temp := map[int]string{}
		for j := 0; j <= Common.RandInt(1, 30); j++ {
			temp[j+1] = strconv.Itoa(Common.RandInt(10000, 99999))
		}
		registerItemArray[i+1] = temp
		diff := func() float32 {
			diff := float32(len(temp) - TmTemp.FreeItemAmount)
			if diff <= 0 {
				return 0
			} else {
				return diff
			}
		}()
		//calcFee+=
		//计算结果
		calcFee += (float32(registerItemAmount) * TmTemp.ItemBasisFee) + diff*TmTemp.ItemExtraFee
	}
	jsonStr, _ := json.Marshal(registerItemArray)
	fmt.Println(TmTemp, jsonStr, calcFee)
}