Waterway's Place recorded the following data: Units Unit Cost Date Received Sold On Hand 1/1 640 $2.40 Inventory 1/8 1030 1670 3.00 Purchased 1/12 Sold 1180 490 The weighted average unit cost of the inventory at January 31 is (Round your answers to 2 decimal places): O $2.40. O $3.40. O $2.77. O $2.71.