37 Inventory records for Herb's Chemicals revealed the following: March 1, 2016, inventory: 1,000 gallons @$7.20 $7,200 Purchases: Sales: Mar. 10 600 gals $7.25 Mar. 5 400 gals Mar. 16 800 gals $7.30 Mar. 14 700 gais Mar. 23 600 gals $7.35 Mar. 20 500 gals Mar. 26 700 gals O $5,005. $5,077. O $5,107. The ending inventory under a periodic inventory system assuming average cost (rounding unit cost to three decimal places) is: O $5,087, 27