Singleton Company's perpetual inventory records included the following information:

Date		Number of Units and Unit Cost	Total Cost
January 1	Beginning inventory	300 units @ $12.00	$ 3,600
March 4	Purchase	250 units @ $13.00	3,250
September 28	Purchase	540 units @ $14.00	7,560
Number of units sold during the year: 820

If Singleton uses the weighted-average cost flow method, its weighted-average cost per unit would be $13.00.