Inventory records from 2019 for Lesley's Pool Supplies was as follows: Unit Cost $4.00 Total Cost $600 Date Jan 1 Mar 15 April 20 July 29 Aug 12 Dec 31 Event Quantity Beg Iny 150 Sale (90) Purchase | 200 Purchase 120 Sale Sale (280) End Iny 100 $4.50 $5.25 $900 $630 Ending inventory at December 31, 2020 assuming perpetual average costing would be closest to