Given the data, calculate the cost of goods sold for the period using the weighted-average method for a periodic inventory system, rounding to the nearest dollar. (Do not round in the process of your calculations, only round your nal answer.) Beginning inventory 4!] units at $12 per unit OS-Mar Purchases 15-Apr Sale 20 units at $14 per unit 30 units at $30 per unit 30-May Purchases 15-Nov Sale 40 units at $11 per unit 50 units at $32 per unit 31-Dec Ending inventory (3 $980 () $2500 (3 $966 (3 $960 20 units