Lowry sells bonsai. A small bonsai costs $30 and a big bonsai costs $20. If he sold 3 small bonsai and 5 big bonsai, how much did he earn?
Lowry earns $30 x 3 = $<T>multiply(30, 3)=90 from selling 3 small bonsai.
He earned $20 x 5 = $<T>multiply(20, 5)=100 from selling 5 big bonsai.
Therefore, the total amount he earned is $100 + $90 = $<T>add(100, 90)=190
