Marquis Company uses a weighted-average perpetual inventory system and has the following purchases and sales: Date Activities Units Acquired at Cost Units Sold at Retail Aug. 2 Purchase 10 units o $32 - $ 320 Aug. 18 Purchase 15 units $34 = $ 510 Aug. 29 Sales 12 units sold What is the amount of the cost of goods sold for this sale? (Round average cost per unit to 2 decimal places.) $830.00 $388.00 $150.50 $398.40 $510.00