17 The following extract of costing information relat dity 'A' for the half-year ending 31st December, 1978 Rs. Purchase of Raw Materials 1,20,000 Stock (31st Dec., 1978) Factory Rent, Rates, Insurance 8,000 Raw Materials Carriage Inwards 1,440 Finished Products Other Factory Overheads 40,000 (2,000 tonnes) Direct Wages 1,00,000 Work-in progress Stock (1st July, 1978) (1st July, 1978) Raw Materials 20,000 Work-in-progress Finished Products (31st Dec., 1978) (1,000 tonnes) 15,000 Sales Finished Produc Administration Overhe Avertising, discounts allowed, and selling costs tonne, 16,900 tonnes of commodity were produced duri You are to ascertain () the net profit for the per Det profit per tonne of the commodity ; (iii) the total for the period ; (iv) the value of raw materials used : of the turnover or the period