receipts for parts supplied by garage

[another_clean_sheet]

Originally Posted by macafee2

First you need to look at the first post, the question at the end and the first word of my reply. Dont miss that I refer to "Their" receipt as in the one between the garage and their supplier. It is this receipt as you say and I mean that may show what discount the garage got and it is not for the customer to see.
The receipt I expect the customer to get, lists the items used and the price that the customer is being charged.

macafee2

The confusion is the way you have written #2.
The first sentence says "the receipt" when you mean the invoice which the garage gives you.
One will never see or expect to see the invoice from the supplier to the garage. There is no reason for the garage to pass on the discount as somewhere they have to recover the cost of material handling.