Wilson goes to a fast-food restaurant. He buys 2 hamburgers for $5 each and 3 bottles of cola for $2 each. Wilson uses his $4 discount coupon. How much money does he pay in total?
2 hamburgers cost 2*5=$<T>multiply(2, 5)=10
3 bottles of cola cost 3*2=$<T>multiply(3, 2)=6
The total price without discount is 10+6=$<T>add(10, 6)=16
With the discount coupon, it's 16-4=$<T>subtract(16, 4)=12
