5. Hardaway Inc. purchased inventory as follows:

Jan. 10 200 units at $5.00

Jan. 20 500 units at $10.00

Jan. 30 800 units at $15.00

Hardaway Inc. had no beginning inventory and has 500 units on hand as of January 31. Assuming the specific identification method is used and ending inventory consists of 100 units from the Jan. 10 purchase, 300 units from the Jan. 20 purchase, and 100 units from the Jan. 30 purchase, ending inventory would be

a. $13,000

b. $4,000

c. $7,500

d. $5,000