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Operation is very simple: offer 100 + the other side of the demand for rebate points or the amount of 10 dollars. Then the offer 110, the contract 110. After the transaction, deduct the tax points incurred by $ 10, the balance to the other side of the purchase.
Here 100 is the product price.
10 is the amount of rebate claimed.
What the other party actually gets is the rebate amount minus the tax.
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The reason for putting the tax amount in is because this is a 17% taxable commodity, i.e., a fixed asset purchase by the other party.