Hi Ray, I now have the incremental pricing passing correctly to the cart - almost. I have two select lists on the page, one for format and one for days, with a Show If around each so that only the format dropdown shows for books and the days dropdown for courses. The format price increments pass OK, but the days incremental pricing doesn't. Would you mind taking a look for me? Page links/FTP details as before, the select list that's not passing the price increment can be seen at the link in the PM section.