Joseph bought 5 folders for school that cost $3 each. He also bought a new backpack. If the total cost was $35, how much did the backpack cost?
A. $5
B. $15
C. $20
D. $50
35 - 3 * 5
= 35 - 15
= 20
A. $5
B. $15
C. $20
D. $50
= 35 - 15
= 20