Daniel buys a magazine costing $0.85 and a pencil costing $0.50. He pays with a coupon that gives him $0.35 off. How much does he spend?
Daniel buys both magazine and pencil for $0.85 + $0.50 = $<T>add(0.85, 0.5)=1.35.
The coupon gives him a total cost of $1.35 - $0.35 = $<T>subtract(1.35, 0.35)=1.0
