2. Help me please.

You work for the Brad's Nailer Company which manufactures three types of nailers: a pneumatic model, the "ProLine", and a cordless model. You have contracted to supply a national retail chain with all three models of nailers. However, Brad's nailer production capability is limited in two departments: production and packaging. The goal is to maximize your revenue. (The number of nailers must be a whole number, and the total number of Pneumatic plus ProLine nailers must be equal to the number of Cordless nailers.) Your answer will be the number of ProLine nailers to be produced