b. Sunrise Limited account for three years ended December 31 is reproduced below. Ratio 2018 2019 2020 Gross profit margin % 36.3 36.3 37.3 ROCE % 24.1 24.5 18.8 Net profit margin % 12.9 13.4 12.4 Asset turnover times 1.76 1.72 1.54 Gearing ratio % 14.8 22.4 21.6 Debt ratio % 19.5 33.0 31.9 Interest cover times 17.8 8.1 5.5 Current ratio ratio 3:2 2..8:1 2..7:1 Quick ratio ratio 1:2:1 1:1:1 1:1:1 Receivable collection period (days) 47 54 65 Inventory turnover period (days) 158 172 184 Payable payment period (days) 35 42 46