Winco

Winco sells four types of products. The resources needed to produce one unit of each and sales prices are:
Resource Product 1 Product 2 Product 3 Product 4
Raw material 2 3 4 7
Hours of labor 3 4 5 6
Sales price ($) 4 6 7 8

Currently, 4600 units of raw material and 5000 labor hours are available. To meet customer demands, exactly 950 total units must be produced. Customers also demand that at least 400 units of product 4 be produced. Formulate an LP that can be used to maximize Winco's sales revenue.