im confused on the purchases part, there isnt any or am i missing something?

homeWork Assignment for February 15th (6 points) The following information was taken from AVF Company's accounting records: 2020 2019 2018 2017 Year-end Inventory 525,000 460,000 390,000 310,000 Year-end Accounts Payable 115,000 113,000 97,500 85,000 Cost of Goods Sold 1,650,000 1,225,000 1,025,000 850,000 An Excel file, 2-15-21 Homework Assignment Solution, containing a solution template, is posted on Blackboard in the Information Textbook Chapter 4 Analytical Procedures Homework Assignment for 2-15-21 folder Required: 1. Download the Excel file, 2-15-21 Homework Assignment Solution to your computer and rename the file as follows: "Your Name" - 2-15-21 Homework Assignment Solution 2. Insert your name at the top of the worksheet. 3. Calculate the following ratios for 2018, 2019, and 2020 using Excel formulas and the ratio formulas presented in Chapter 4 of Auditing, A Practical Approach with Data Analytics Inventory turnover in days. Payables turnover in days. 4. Recalculate the payables turnover in days ratio using Purchases in the numerator instead of Cost of Goods Sold. 5. Copy the Value View worksheet to a Formula View worksheet and show the Excel formulas on the Formula View worksheet