Spend deals at CVS

Hi everyone I’m new to couponing and had a quick question:

For spend deals at CVS like spend 20 get 10 dollar extra bucks, do sale items get put towards the total with their regular price or their sale price?

I went today to try to get the spend 20 get 10 for the shaving deal so I put two packs of Skintimimate razors that were 6.99 but 9.29 usually and a small travel size shave gel to meet the 20. When I checked my recipe the extra bucks didn’t print and said I need to spend 3.30 to get my extra bucks. It looks like it took the sale price but didn’t know if this was usually the case. Also I did this in store and printed out a digital reciept sent to my email.