I'll give you the formula, and you do the math:
Price excluding tax = price including tax÷1.17.
Tax rebate = price excluding tax × tax rebate rate = price including tax ÷ 1. 17× tax rebate rate.
Cost = price including tax
Sales price = sales USD × foreign exchange quotation.
Profit = sales price-cost+tax refund = sales price-price including tax+price including tax ÷ 1. 17× tax refund rate.
= sales price-price including tax (1- tax refund rate ÷ 1. 17)
= sales USD × foreign exchange quotation-tax included (1- tax refund rate ÷ 1. 17)
For example:
1. If the price including tax is 1.00 yuan and the profit is 0, then:
0= sales USD × foreign exchange quotation-tax included (1- tax refund rate ÷ 1. 17)
Sales USD = price including tax (1- tax rebate rate ÷ 1. 17)/ foreign exchange quotation.
2. The profit rate is 2% (i.e. profit =2%* price including tax), the foreign exchange rate is 6.95, and the tax rebate rate is 17%.
2%* price including tax = sales USD × foreign exchange quotation-price including tax (1- tax refund rate ÷ 1. 17)
Sales USD =(2%* including tax price+including tax price-including tax price * tax rebate rate ÷ 1. 17)/ foreign exchange quotation.
= price including tax (1.02- tax rebate rate ÷ 1. 17)/ foreign exchange quotation.
= Price including tax (1.02-17% ÷1.17)/6.95.
=0. 126 tax included