Example: The Fixed-Charge Problem: machine scheduling Eastland Corporation is planning to produce at least 900 pollution control valves. Three production lines are available with the setup costs, unit processing (variable) costs and capacities given below. Find which lines to use in order to minimize total cost. Line Setup Cast Unit Processing Cast Max. Capadty A $850 $20 500 B 150 58 700 C 520 36 620