Grover bought 3 boxes of face masks. He plans to sell them for $0.50 each. If each box has 20 face masks, and he bought the 3 boxes for $15, how much will be his total profit?
Grover will earn $0.50 x 20 = $<T>multiply(0.5, 20)=10.0 for each box.
So, he will earn $10 x 3 = $<T>multiply(10, 3)=30 after selling all the face masks.
Therefore, his total profit will be $30 - $15 = $<T>subtract(30, 15)=15
