Below is the purchase and sale history of a company's product, maintained under the First-In, First Out method, following the perpetual approach: Date Transaction Units $/Unit Jul 1 Opening Balance 49 $ 4.33 Jul 6 Purchase 12 $ 6.35 Jul 13 Sale 53 ??? Jul 23 Purchase 18 $ 7.01, How would your answer if you used the Weighted Average method instead