3. The HKSCE company produces and sells a product, named Success, at $30 per unit. Each year 6,000 of this product are sold. The marketing director suggests that, if the price is reduced to $28, sales will increase to 8,000 units. The sales manager thinks that sales will increase to 11,000 units if the price is further reduced to $25. The following information is available for 6,000 units. Direct materials $48,000 Direct labour $66,000 Variable selling expenses (commission) $12,000 Fixed expenses $48,000 a) Calculate the profit or loss from the sale of (1) 6,000 (ii) 8,000 and (iii) 11,000 units. Recommend which option should be adopted. (7 marks) b) Evaluate the usefulness of marginal costing