How old are you?

I got in to a heated discussion the other day when the "cashier" rang up my $5.25 order. I handed her a $10 bill and grabbed a quarter and handed it to her. I got this puzzled stupid look and she tries to hand me $4.75 change? I looked at her and said "Honey I want a $5 back NOT 4 singles and 3 quarters" She replies back " My Manager won't let me make changes after the register rings the order up" I am SERIOUSLY about ready to lose it for the simple stupidity being displayed (I AM THAT GRUMPY OLD GUY LOL) I was firm but not nasty about it and she finally handed me a $5 bill. I Thanked her and left shaking my head. Simple math skills should be taught in school TO EVERYONE or you can't graduate. THE DUMBING DOWN OF AMERICA IS WORKING!!!