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Specialist cost and management accounting techniques

Ssana7y ago
Hello sir, I’ve come across a small doubt in calculation part of the question below. Please help me in it!. Q: Corrie (BPP exam kit) Corrie produces three products X,Y,Z. The capacity of Corries plant is restricted by process alpha. Process alpha is expected to be operational for 8 hrs per day and can produce 1200 units of X per hour, 1500 units of Y per hour and 600 units of Z per hour. Selling prices and material costs for each product are as follows: Product. X. Y. Z Selling price p.u 150. 120. 300 Material cost pu. 70. 40. 100 Throughtput Contribution pu. 80. 80. 200 Conversion costs are 720,000 per day. A change in factory cost arose, giving a new figure for conversion costs per factory hour of 80,000. What is the revised TPAR RATIO for each product? Solution: throughput contribution per factory hour is calculated as: X: 80 * (60/0.05mins)= 96000 But I don’t understand why throughput per factory hour is calculated this way. Shouldn’t we divide throughput pu and factory hour pu? So then it must have been like 80/(0.05/60) Sir, please help me in finding out the reason of it being calculated as in the solution. Thanks in advance!
John MoffatJohn MoffatTutor7y ago#1
You can get the same figure in several ways. Given that they can produce 1,200 units per hour, the time per unit is 1/1,200 hours. Therefore the contribution per hour is 80 / (1/1,200) = $96,000 Alternatively (as BPP have done it), if they can produce 1,200 units per hour and if each unit gives a contribution of $80, then the contribution per hour is 1,200 x $80 = $96,000. What you have written is also fine. Each units takes 0.05 minutes, and therefore the contribution per hour is 80/(0.05/60), which is also equal to $96,000. It doesn't matter which way you get the figure - whichever you find the easiest - but the final answer is the same whichever way.
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