A hardware manufacturer uses four workstations to produce nuts and bolts. The following table provides the number of minutes required to create a batch of nuts or bolts at each workstation: 

The following table lists the cost of machining a batch of nuts or bolts:

The machines at each workstation run for 16 hours a day, 5 days a week. A minimum of 700 batches of nuts and 1000 batches of bolts must be produced each week. Use the Solver to determine the optimal number of batches of nuts and bolts to produce at each workstation in order to minimize the cost of machining.