For the life of me I can't figure out what's wrong with "our customer". Is it better to identify the customer as his very own or to use the more polite "our customer"? Clearly he is asking for a payment voucher so the account can be settled and the customer pays. An invoice goes the other way i.e. from his company to the customer in question, in other words, the bill.
This Calculation are quite unable to understand.
[STRIKE]Ok[/STRIKE] OK, in Pakistan the seller [STRIKE]makes the invoice with[/STRIKE] includes 17% GST (sales tax) (no full stop here) and the [STRIKE]bayer[/STRIKE] buyer [STRIKE]will[/STRIKE] deducts 20% of the GST (17%) and 6% income tax of the total value of the invoice. By the way, where [STRIKE]r u[/STRIKE] are you from?