I guess we've been lucky before but I'm encountering a persistent 1p out between invoice and payment.
We have just started a new web site using prices which are built around prices calculated in Standard ERP using the discount matrix. I worked them all through in SERP before inputting them into the site, but when a couple of other items are added and then VAT is calculated some of them are 1p out.

Without major debugging of the price structure I need an easy way of knocking 1p off my VAT calculation.


There is nothing on the Invoice, goods receipt or Invoice (that I can see), how would I deal with this at the payment /receipt level. I don't have the currency modules so can't use the round off facility I presume.