A: Generally, refer to the foreign exchange quotation published by the People's Bank of China on the same day. If the foreign exchange rate of USD is 650: 100 on May 4th, then RMB 10 is equivalent to USD 10/6.5= 1.5385.

According to the tax rate of 17%, the customer should be given a tax refund of 13%:1.5385 *13% = USD 0.2.

This is explained according to your meaning. In fact, I want to tell you that the tax rebate rate is 13%, and the actual maximum tax rebate is actually

13%-( 17%- 13%)=9%! Because enterprises still have 4%( 17%- 13%) tax exemption, we should take this into account when giving preferential treatment to customers.