A company has a beginning inventory of 10 units at $50. Every week for four weeks an additional 10 units are purchased at respective cost of $51,$52,$55, and $60. Thirty eight units were sold for $72 each . The total cost of goods sold that were available for sale would be: a. $2,680 b. $1,010 c. $2,736 d. $2,280 e. $2,180