Larkspur Aircraft sells a wide variety of model aircraft and uses a perpetual inventory system. On June 1, Larkspur Aircraft had five Cessna 560 model airplanes on hand at a unit cost of $76. During June and July, the company had the following purchases and sales for this airplane (all for cash): Determine the cost of goods sold and ending inventory under a perpetual inventory system using (1) FIFO and (2) weighted average. (Round the weighted average cost per unit and final answers to 2 decimal places, eg. 5.275.75.) Calculate gross profit using (1) FIFO and (2) weighted average. (Round the weighted average cost per unit and final answers to 2 decimal places, eg. 5.275.75.)