You learnt below from the annual report of ACY Alpha Limited: "ACY Alpha Limited sells computer accessories to retail customers through its online sales platform. The market of accessories such as keyboards, USB memory sticks, and etc. is mature and stable. As a strategy to optimize the product mix, more expensive product lines are being introduced on its online sales platform since customers are more willing to pay a premium for brand-named goods... Statement of Profit or Loss Sales revenue Less: Cost of goods sold Gross profit Year 2019 $ 3,182,700 (2,387,025) 795,675 Year 2018 S 3,090,000 (2.777,910) 312,090 Year 2017 S 3,000,000 (2.700,000 300,000 Other operating expenses (459,135) (222,700) (220,000) Income before tax Less: Income tax expense 336,540 (33,654) 89,390 (8,939) 80,000 (8,000) Net income 302.886 80,451 72.000 Extract of Statement of Financial Position 31.12.2019 31.12.2017 31.12.2018 $ 210,000 Inventory 330.000 200.000 Required: (a) Compute the index-number trend percentages for each of the accounts below in all years, using 2017 as the base period. (1) Sales revenue; (11) Gross profit; Other operating expense; and (iv) Inventory (year-end) (12 marks) (b) Calculate below: (i) Gross profit margin in 2018; (ii) Gross profit margin in 2019, (iii) Average days to sell inventory in 2018; and (iv) Average days to sell inventory in 2019. (12 marks) (c) For items (i) and (ii) in Part (a) above, analyze the trend, the observed results, and the likely reason(s) behind respectively (14 marks) In Question 1. round your answers to one decimal place in amount /dollar / percentage (l/applicable)