Roxanne bought 2 cups of lemonade for $2 each and 2 sandwiches for $2.50 each. How much change must she get from a $20 bill?
Two cups of lemonade amount to $2 x 2 = $<T>multiply(2, 2)=4
Two sandwiches amount to $2.50 x 2 = $<T>multiply(2.5, 2)=5.0
So, the total amount that Roxanne had to pay was $4 + $5 = $<T>add(4, 5)=9
Thus, her change must be $20 - $9 = $<T>subtract(20, 9)=11
