运费$$ \rm Ocean \ Freight = \begin{cases} \rm \frac {Chargeable \ Weight} {10} \times 0.06 \quad (普货) \\ \\ \rm \frac {Chargeable \ Weight} {10} \times 0.07 \quad (敏感/特货) \end{cases} $$体积重$$ \rm Volume \ Weight = \frac {Length(cm) \times Width(cm) \times Hight(cm)} {8000} \times 1000 $$计费重计费重量为每 10g 为一个计费标准，不满 10 克的部分按 10 克计算。$$ \rm Chargeable \ Weight = \Bigg \lceil \frac {max\{Gross \ Weight, Volume \ Weight\}} {10} \Bigg \rceil \times 10 $$VAT$$ \rm VAT = \begin{cases} \rm (Before \ Tax \ Price + Ocean \ Freight) \times 20\% \\ \rm Sale \ Price \times 20\% \end{cases} $$平台佣金$$ \rm Platform \ Commission = (Sale \ Price − VAT) \times 5\% $$Note：5%会随着业务发展随时变动税前价$$ \rm Before \ Tax \ Price = \frac {Sale \ Price} {1 + 20\%} − Ocean \ Freight $$成本价$$ \rm Cost = Product \ Cost + Domestic \ Shipping + Ocean \ Freight $$销售收入净额$$ \rm Net \ Sales = Sale \ Price − VAT − Platform \ Commission $$毛利率$$ \rm Gross \ Margin \ Percentage = \Bigg \lfloor \frac {Net \ Sales − Cost} {Net \ Sales} \Bigg \rfloor \times 100\% $$售价在设置固定毛利率且 $ \rm Platform \ Commision \ Rate = 5\%$ 的情况下，售价的计算公式如下；$$ \begin{align} & \rm \because Net \ Sales = Sale \ Price − VAT − Platform \ Commission \\ \\ & \rm \therefore Sale \ Price \approx 1.32 \ Net \ Sales \\ \\ \\ \\ & \rm \because Gross \ Margin \ Percentage = \Bigg \lfloor \frac {Net \ Sales − Cost} {Net \ Sales} \Bigg \rfloor \times 100\% \\ \\ & \rm \therefore Net \ Sales = \frac {Cost} {1 − Gross \ Margin \ Percentage} \\ \\ \\ \\ & \rm \Rightarrow Sale \ Price = 1.32 \times \frac {Cost} {1 − Gross \ Margin \ Percentage} \end{align} $$$$ \Longrightarrow \rm Sale \ Price = \begin{cases} \rm \Big \lceil 1.32 \times \frac {Cost} {1 - Gross \ Margin \ Percentage} \Big \rceil - 0.01 \quad (Sale \ Price \ mod \ 1 \geq 0.5) \\ \\ \rm \Big \lceil 1.32 \times \frac {Cost} {1 - Gross \ Margin \ Percentage} \Big \rceil - 0.51 \quad (Sale \ Price \ mod \ 1 < 0.5) \end{cases} $$Note：$\rm VAT$和卖家运费已经自动包含在本地展示价中，如果没有海外仓，则本地展示价/(1+VAT)不能超过134.5英镑。