Mirasol had $50 in her account. She spent $10 on coffee beans and $30 on a tumbler. How much is left in her account?
Mirasol spent a total of $30 + $10 = $<T>add(30, 10)=40
Thus, Mirasol has $50 - $40 = $<T>subtract(50, 40)=10 left in her account.
