18. During 2021, Cinnamon Buns Co. (CBC) recorded the following transactions relating to its inventories (listed in chronological order)

January 1 Beginning inventory 70 units @ $55

May 10 Purchase 40 units @ $60

July 22 Sale 90 units @ 105

November 3 Purchase 70 units @ $65

If CBC uses the perpetual LIFO method to account for its inventory, its cost of goods sold for the year ended at December 31, 2021 should be:

a. 5,150

b. 5,750

c. 9,450

d. 5,050