26. You are told that the objective row of the final tableau of a linear programming solution to a contribution maximisation problem showed shadow price values of +2 and 0, respectively, in the columns for products A and B. A third product which was included in the initial formulation is shown by separate analysis to have a dual value of-3 (i.e. a deficit value if produced). Product selling prices were Rs 20, Rs 30, Rs 15 per unit respectively.

You are required to provide:

(a) An interpretation of the values + 2, 0, -3 which were based on the estimated demands for the products at the given prices;

(b) As assessment of the use the information in

(a) may have in product planning.