ACCA MA BPP questions

8b.8 The following question is taken from the July to December 2013 exam period. Two joint products A and B are produced in a process. Data for the process for the last period are as follows: Product A B Tonnes Tonnes Sales 480 320 Production 600 400 Common production costs in the period were $12,000. There was no opening inventory. Both products had a gross profit margin of 40%. Common production costs were apportioned on a physical basis. What was the gross profit for product A in the period? ? $2,304 ? $2,880 ? $3,840 ? $4,800 (2 marks) The following question is taken from the January to June 2017 exam period. In a period, a process produced 2,000 kg of a main product and 400 kg of a by-product. The cost of production was $5,000. 1,800 kg of the main product were sold at $10 per kg and all of the byproduct produced was sold for $1per kg. There was no opening inventory. If the sales income of the by-product is deducted from the cost of production, what is the profit for the period? ? $13,400 ? $13,860 ? $13,900 ? $15,860 8b.9 The following question is taken from the July to December 2015 exam period. A process produces two joint products A and B in equal physical quantities. A and B are sold at split off point for $5 per kg and $8 per kg respectively. There are no further costs after the split off point. If joint costs are apportioned on a relative sales value basis, which of the following statements is true? ? Both products will have the same return on sales ratio (operating margin) ? Product A will have the higher return on sales ratio (operating margin) ? The cost per kg will be the same for both products ? The cost per kg of product A will be higher than that of product B Could you help me with 3 questions ? I didn't understand the question neither I did understand the answers...