8- Worth 10 Points. Selected data for Caitlin Store appear below. Assume all sales were on credit. 2018 2019 Net sales $630,000 $520,000 Cost of goods sold 520,000 420,000 Inventory at end of year 64,000 85,000 Accounts receivable at end of year 70,000 50,000 Net income 16,000 13,000 Instructions Compute the following 5 calculations for 2019: 1 - Gross Profit (Gross margin) Amount 2- Gross profit (Gross margin) ratio 3 - Profit margin ratio 4 - Inventory tumover ratio 5 - Receivables turnover ratio