Comment Re:if not collecting the data (Score 0) 75
Total sale amount, tax amount, location, time of day,other telemetry data, age of purchaser, name of purchaser, address of purchaser, address of the location, etc of the shop where the purchase was made, and of course Apple's own cut of the deal. There's probably more involving the back end of your banking facility, such as which bank and/or account was used to make the purchase during the transaction.
That's what I can think of off of the top of my head.