Total, marginal, and average product against the variable input (workers) I II III Total Product Product 24.3 0 MP = AP MP = 0 LAP L* Marginal Product Average Product Variable Input (Workers) Product 13.5 8.1 L = 3 3 workers: total product 24.3, marginal product 13.5, average product 8.1. Stage I — each new worker adds more than the one before; aprofit-seeker never stops here.