An Activity Based Costing (ABC) system is in operation in Grange Supplies Ltd which operates a builchig supplies business. The annual overheads of the Sales and Administration function have been identified to the following cost pools: Cost Driver details are analysed over four departments as follows: Reguired: (i) Calculate the cost driver rates for each cost pool (ii) Using the cost driver rates, analyse the total Sales and Administration costs over four departments. (50%) (iii) Caiculate the monthly cost for the Timber department in May based on tho fnllnwine activity level: (15%) (iv) Briefly discuss the need for new approaches to costing in the modern business environment such as Activity Based Costing. (25\%) Total 100%