2 JG Sports World is a retailer in a line of sports products. The beginning inventory of a particular sports shoes product and the purchases during the current year, were as follows: Date Unit Cost (RM) January 1 March 9 Beginning inventory Purchases August 20 Purchases November 15 Purchases Units 30 50 50 60 95 90 85 80 The following are information about the sales activities of the above product during the year. Date April 10 Sales September 11 December 23 Sales Sales Required: Units Selling Price (RM) 42 220 60 117 65 115 a. Assuming the company uses a perpetual inventory system, calculate the cost of sales and the value of the ending inventory using the First-In First- Out (FIFO) inventory valuation method. b. Assuming the company uses a periodic inventory system, calculate the cost of sales and the value of the ending inventory using the weighted average inventory valuation method. c. Calculate the revenue and gross profit of the company for the year ended 31 December 2019. d. It was discovered that all the units of the ending inventory that was remaining at the end of September 2019 were slightly damaged, hence the net realizable value of the unsold units were only RM 60. What would be the value of ending inventory under FIFO method and weighted average method taking into consideration this damaged inventory? Explain your