I weep for the lost math

I decided to stop off for a take-n-bake pizza on the way home from work tonight... and I happened to have a coupon on me for a large, 3-topping pizza for $9.49. Turns out the regular list price for this item is $12.49. The young lady at the till had to pull out a calculator to determine the difference was $3.00, so she could enter the discount into the register. I've seen youngsters with math problems at cash registers before, but rarely so... pathetically obvious, I guess.