LiFO Perpetual Inventory The beginning inventory at Dunne Co. and data on purchases and sales for a three-month period are as follows: unit cost first in the Cost of Goods Sold Unit Cost column and LOWER unit cost first in the Inventory Unit Cost column. 2. Determine the total sales, the total cost of goods sold, and the gross profit from sales for the period. Total sales Total cost of goods sold Gross profit from sales $ $ $ 3. Determine the ending inventory cost on June 30