21¢ with $2.73 back

I'm not sure how this happened.  After all, I only had two coupons, used no Extra Care Bucks, and bought stuff that was not free for me.  My total before tax was 1¢, at least that's what my receipt said! 

I bought:
Russel Stover's Vanilla Cream Egg
a bag (2.52 oz) of mini Reese's Cups
a bottle of bubbles
Citrus Coconut anti-bacterial hand sanitizer

My total came to 21 cents.

I received back $2.73 in Extra Care Bucks.