For the following question please show all work, need to make sure where I am wrong. Thank you.

At May 1, 2022, Whispering Winds Corp. had beginning inventory consisting of 280 units with a unit cost of $6. During May, the company purchased inventory as follows: 550 units at $6 - 830 units at $7 The company sold 1380 units during the month for $11 per unit. Whispering Winds Corp. uses the average cost method. The value of Whispering Winds Corp.'s inventory at May 31, 2022 is (Round average cost per unit to 2 decimal places, e.g. 12.52.) $10790. $1680. $1820. $1960