At the beginning of February, Zenna Inc. had 100 inventory units that had been purchased at $1 each. On February 5, Zenna purchased 200 units of inventory for $2.5 each. Then on February 11, Zenna sold 250 units of inventory for a price of $5 each. Zenna uses moving average method for inventory valuations. What is the amount of cost of goods sold for the month of February?

Select one:

a. $550

b. $100

c. $475

d. $437.50

e. $500