Task 5 APC Machining uses a job costing system that is integrated with activitybased costing. Application rates used for allocating overheads to jobs are as follows. Activity area Cost driver Application rate Preparation Labour hours $20 per hour Cutting Machine hours $24 per hour Assembly Number of parts $8 per part Finishing Number ofunits $40 per unit Packing Weight of units $7 per kg Details forjobs completed in December were as follows. Job no. 4'7 Job no. 49 Direct materials costs $4,000 $10,000 Direct labour costs $6,700 $18,600 Labour hours preparation 45 120 Machine hours cutting 65 165 Number of parts 600 1,500 Number of units 50 150 Weight of units 300 kg 750 kg Required: a. Develop a simple organisational policy and procedures for purchase of materials. b. Calculate the total manufacturing costs for each job. Show all the workings in your answer. c. Calculate the costs per unit for each job. Show all the workings in your