Gross Profit Method A fire completely destroyed all the inventory of Glisan Lumber Yard on August 5, 20--. Fortunately, the accounting records were not destroyed in the fire. The following information is provided by Glisan Lumber Yard for the time period January 1 through August 5: Beginning inventory, January 1, 20-- $90,000 Net purchases, January 1 through August 5 439,000 Net sales, January 1 through August 5 728,000 Normal gross profit as a percentage of sales 45%