Summer Math Challenge Level 2 Change Please

This is question 2 of our 10 day #summermathchallenge! Can you come back each weekday and pass all 10 levels? Good luck!

Trish went into the grocery store with a twenty dollar bill and a ten dollar bill. She bought two pineapples for $3 each,  a frozen pizza for $8, and 6 avocados that were $2 each. How much change should Trish receive? Watch the video below for the answer and explanation.