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

You work for the Brad's Nailer Company which manufactures two types of nailers: a pneumatic model and a cordless model. You have contracted to supply a national retail chain with both pneumatic nailers and cordless nailers. However, Brad's nailer production capability is limited in three departments: production, testing, and packaging. Your answer will be the testing hours needed to execute a production plan that minimizes costs rounded to the nearest whole hour. (The number of nailers must be a whole number.)