Roki Inc. uses the periodic inventory system and has the following data for the month of June: June 1 On hand, 50 units @ $15.00 each $ 750.00 Purchased 115 units @ $15.10 each 1,736.50 Purchased 75 units @ $15.20 each 1,140.00 Total cost of goods available for sale $3,626.50 On hand, 90 units If Roki uses the weighted average cost method, the amount assigned to the June 30 inventory would be a. $1,359.90. b. $1,549.00. c. $1,486.50. d- 1591.50