Both should work.

It should say for example: I see you have a discount card! I'll give you a discounted price of 339 sP! Vanilla Strawberry Sandwich Cookie has been added to your inventory. Your main shop discount buff gave you 15% (75 sP) off the main price!

A lot of people don't see the original discount cause the 15% buff shows in green but it is there in the first line. Can you check for me and make sure this is the case?

welcome! Locking as resolved!