A car company produces 3 models, model A / B / C. Long-term
projections indicate an expected demand of at least 100 model A
cars, 80 model B cars and 120 model C cars each day. Because of
limitations on production capacity, no more than 200 model A cars
and 170 model B cars and 150 model C cars can be made daily. To
satisfy a shipping contract, a total of at least 300 cars much be
shipped each day....