Colletti Company recorded the following data: Units Unit Date Received Sold On Hand Cost 1/1 Inventory 600 $2.00 1/8 Purchased 900 1,500 2.20 1/12 Sold 1,200 300 The weighted average unit cost of the inventory at January 31 is: a. $2.00. b. $2.10. c. $2.12. d. $2.20