Profit-maximizing number of inputs for the Panther Widget Company
PRODUCTION SCHEDULE COSTS REVENUES PROFIT
Number of workers Total Product Marginal Product Fixed Costs Variable Costs  Total Costs Marginal Cost per Unit Total Revenue Marginal Revenue Marginal Revenue Product Total Profit
0 0   $100 0 100   $0 $10   -100
1 2                  
2 8                  
3 20                  
4 35                  
5 52                  
6 70                  
7 85                  
8 93                  
9 90                  
10 80                  
Assume the only variable cost is salary, at the rate of $35/worker.
Assume that widgets are sold in a perfectly competitive market for $10 each.