6 Hira Singh owns a taxi, a bus and a truck, The bus is 50 seater. The maximum capacity of the truck is 10 tons. The taxi runs on an average 3,000 kms. in a month out of which 20% is normal running without fare. Variable cost of running the taxi is Rs. 8 per km. The bus and the truck run between Delhi and Jaipur, one way distance being 300 kms. The bus makes 25 round trips in a month and is generally 90% occupied. Variable cost of running a bus is Rs. 13-50 per km. The truck makes 20 round trips in a month and is fully loaded on outward journey but only 90% loaded on return. Variable cost of running a truck is Rs. 9.50 per km. You are required to calculate : (i) Total variable cost per month and variable cost per effective km. for the taxi ; (ii) Total variable cost per month and variable cost per effective passenger-km. for the bus ; and (iii) Total variable cost per month and variable cost per effective tonne-km. for the truck