Ursula bought five hot dogs at $1.50 each and three salads at $2.50 each. If she had two $10 bills, how much change did she get back?
Five hotdogs cost 5 x $1.50 = $<T>multiply(5, 1.5)=7.5.
Three salads cost 3 x $2.50 = $<T>multiply(3, 2.5)=7.5.
The total cost was $7.50 + $7.50 = $<T>add(7.5, 7.5)=15.0
And, Ursula had 2 x $10 = $<T>multiply(2, 10)=20
Therefore, Ursula got a change of $20 - $15 = $<T>subtract(20, 15)=5
