solved according perpetual method

Q5. Assume SportCheck outlet store began October 2016 with 47 pairs of water skis that cost the store $38 each. The sale price of these water skis was $67. During October, the store completed these inventory transactions: COM204.C1001&C1005. 2021 Spring Assignment #3 (Ch4&5) Due on March 5 Units Unit Cost Unit Sale Price Oct. 5 Sale 19 $ 38 $ 67 8 Purchase 80 $ 40 10 Sale 28 $ 38 $ 67 15 Sale 10 $ 40 $ 68 20 Sale 30 $ 40 $ 68 25 Purchase 24 $ 42 Requirements: 1. The preceding data are taken from the store's perpetual inventory records. Which cost method does the store use? Explain how you arrived at your answer. 2. Determine the store's cost of goods sold for October. Also compute gross profit for October. 3. What is the cost of the store's October 31 inventory of water skis