I couldnt figure out how to determine the "Average Gross Profit Rate" for this question. Please help!!

Inventory with a cost of $17,000 was salvaged from the fire. Answer the following (a) Your answer is correct Determine the balances in sales revenue and purchases at April 10. 229400 Sales Revenue Purchases at April 10 107800 eTextbook and Media Assistance Used Attempts: 4 of 5 used (b) * Your answer is incorrect. Determine the average gross profit rate for the years 2020 and 2021. (Hint: Find the gross profit rate for each year and divide the sum by 2.) Average Gross Profit Rate 3.034 % e Textbook and Media Save for Later Attempts: 1 of 5 used Submit Answer On April 10, 2022, fire damaged the office and warehouse of Swifty Company. Most of the accounting records were destroyed, but the following account balances were determined as of March 31, 2022: Inventory (January 1, 2022), $61,000; Sales Revenue (January 1-March 31, 2022), $180,000; Purchases (January 1-March 31, 2022), $91,000. The company's fiscal year ends on December 31. It uses a periodic inventory system. From an analysis of the April bank statement, you discover cancelled checks of $4,000 for cash purchases during the period April 1- 10. Deposits during the same period totaled $19,500. Of that amount, 60% were collections on accounts receivable, and the balance was cash sales. Correspondence with the company's principal suppliers revealed $14,400 of purchases on account from April 1 to April 10. Of that amount, $1,600 was for merchandise in transit on April 10 that was shipped FOB destination. Correspondence with the company's principal customers produced acknowledgments of credit sales totaling $35,000 from April 1 to April 10. It was estimated that $6,600 of credit sales will never be acknowledged or recovered from customers. Swifty Company reached an agreement with the insurance company that its fire-loss claim should be based on the average of the gross profit rates for the preceding 2 years. The financial statements for 2020 and 2021 showed the following data. Net sales Cost of goods purchased Beginning inventory Ending inventory 2021 $680,000 452,000 60,000 70,000 2020 $400,000 314,000 30.000 60,000 Inventory with a cost of $17,000 was salvaged from the fire. Answer the following