We will assign 803 per unit because that is the weighted average cost of those units on January 7. We will use this figure in the calculation for January 17. Then divide cost by the total number of units.
Then subtract the cost of inventory remaining at the end of the year.
Multiply that cost by the amount of inventory sold. Consider that the Cost of Goods Sold for 250 units has to be determined using FIFO. Determine the weight of each number. We will assign 803 per unit because that is the weighted average cost of those units on January 7.