The weighted-average unit cost of the inventory at January 31 is: 

1680 Vaughn's Place recorded the following data: Units Date Received Sold On Hand Unit Cost 670 $2.70 1/1 Inventory 1010 1680 3.00 1/8 Purchase 1/12 Sold 1250 430 The weighted-average unit cost of the inventory at January 31 is: O $2.78 O $2.88 O $2.70 O $3.40