Lauer's Sporting Goods had the following inventory records for the month of January. Beginning inventory 70 units @ $200 per unit Sales, Jan. 1 - Jan. 10 50 units Purchase, Jan. 11 40 units @ $206 per unit Sales, Jan. 12 - Jan. 20 50 units Purchase, Jan. 21 50 units @ $210 per unit Sales, Jan. 22-31 40 units Assuming the Weighted-Average method is used, what is the total cost of Lauers ending inventory on January 31? A. $4,000 B. $4,200 C. $4,100 D. $4,180