help please, if u could show work that would be awesome.

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. Your answer will be the number packaging hours to be produced (The number of nailers must be a whole number.)