illini Supplies maintains its hand-held graphing calculator inventory using the perpetual inventory method. The inventory records for May follow: Beginning inventory 20 units @ $105 each May 12 purchase 30 units @ $120 each May 20 sale 40 units @ $195 each May 25 purchase 15 units @ $115 each Using the weighted-average cost method, how much is the May 31 inventory on Illini Supplies' balance sheet? Select one: O a. $1,725 O b. $2,865 O C. $2,825 O d. $2,650