quick! please help with this question, accuracy really matters. i guessed at an answer but don't know if it is right

Multiple Choice Question 51 Coronado's Place recorded the following data: Units Unit Date Received Sold On Hand Cost 1/1 Inventory 700 $2.10 1/8 Purchased 980 1680 2.70 1/12 Sold 1290 390 The weighted average unit cost of the inventory at January 31 is: $3.10. $2.10. $2.39. 0 $2.45