Use the Following Information for Questions

Multiple Choice

Use the following information for questions.
A company just starting its business made the following four inventory purchases in June: On June 25, the company made its first sale when a local customer purchased 500 units for $3,500. The company uses a perpetual inventory system.
-Mandy Corp. purchased inventory as follows:March 3 500 units at $18March 4 300 units at $20March 7 200 units at $22On March 5, Mandy sold 600 units for $18 each. The average unit cost to be used for the cost of goods sold on March 5, in a perpetual inventory system, is

A) $18.80.
B) $19.40.
C) $25.00.
D) $16.67.