John is performing in 3 plays.  Each play has 5 Acts.  He wears 2 wigs per act.  Each wig cost $5.  He drops one of the plays and sells all of the wigs for that play for $4.  How much money did he spend?
He used 5*2=<T>multiply(5, 2)=10 wigs per play
So in total, he used 10*3=<T>multiply(10, 3)=30 wigs
They cost 30*5=$<T>multiply(30, 5)=150
He gets back 10*4=$<T>multiply(10, 4)=40 from selling the wigs
So he spent 150-40=$<T>subtract(150, 40)=110
