Joe is buying school supplies. He buys 2 pencils, 4 erasers, 10 pens, and a backpack for $20. Pencils and pens cost the same amount. If p represents how much each pencil and pen costs, and e represents how much each eraser costs, the following expression shows how much Joe spent on school supplies: 2p + 4e + 10p + 20

Simplify Joe’s total spending expression.

Simplified Expression:

When shopping, Joe noticed the prices for the items he purchased; each pen and pencil (p) cost $0.85 and erasers (e) cost $1.15 each. Determine the amount that Joe spent on his supplies. Show your work:

Joe Spent $