PCM Ltd manufactures three basic desktop computers and the following data applies: Cost () DPC500 DPC1000 DPC1500 Direct labour 102.00 110.00 120.00 Direct material 124.00 144.00 192.00 Direct expense 42.00 43.00 49.00 Selling price 770.00 850.00 950.00 The production overheads are calculated with an OAR of 350 per cent of the direct labour costs. All other overheads are based on an OAR of 22 per cent of the production cost. 

Determine: (a) the production cost for the three computers; (b) the total cost for all three; (c) the profit for all three; (d) the contribution for all three