The document discusses an optimization problem faced by a furniture company to maximize profit from chair and table production given machine time constraints. It presents the primal problem of maximizing profit and the dual problem of minimizing machine rental costs. The optimal solution from the primal problem is used to interpret the dual solution and find the shadow prices: M1 is worth Rs. 5 per hour, M2 is worth Rs. 0 per hour, and M3 is worth Rs. 2.5 per hour. The complementary slackness property and concept of binding vs. non-binding constraints is also explained.