Is their a way to sell products as new or used as the same items with different UPC's either within GP or with a ISV application

We are trying to sell a product with a selling price to 4 decimal points and can't make the invoice round properly to 2 decimal points. Has anybody dealt with this issue and solved it? Thanks in advance

I have set up a Repeating Order, repeating Monthly. After transferring the document to an invoice the Master Number on the Invoice is not the same as the Master Number on the original Order. Is this an error or is this the way that repeating orders work?