Vamsi Company manufactures a single product having a marginal cost of Rs. 1.50 per unit.Fixed cost is Rs. 30,000 per annum. The market is such that up to 40,000 units can be sold at a price of Rs. 3.00 per unit, but any additional sale must be made at Rs. 2.00 per unit. Company has a planned profit of Rs. 50,000. How many units must be made and sold?