Opening inventory al 1 July 2021 Purchases on 1 August 2021 Purchases on 15 February 2022 Purchases on 20 June 2022 500 units @ $250 1000 units @ $260 500 units @ $290 900 units @ $300 $125000 $260000 $145000 $270 000 Total 2900 units $800 000 During the year, Farrelly Ltd sells 2500 surfboards. The company uses the periodic system to manage inventory You are required to calculate the cost of sales, and ending inventory values, using the following cost-flow methods: a first-in, first-out (Firo) b weighted average clast-in, first-out (LIFO)