Chapter 6.3, Problem 52E

In Problems 49-58, construct a mathematical model in the form of a linear programming problem. (the answers in the back of the book for these application problems indicate the model.) then solve the problem by applying the simplex method to the dual problem.

Mining. Repeat Problem 50 if it costs $\text{\$}300$ per hour to operate the West Summit mine and $\text{\$}700$ per hour to operate the North Ridge mine and all other data remain the same.