Please pay attention that this is only one question but it is divided into 3 parts. If you could explain all 3 parts that would be great. Thank you, I appreciate it.

IThe following information applies to the questions displayed below.) During the year, TRC Corporation has the following inventory transactions. Number of Units 46 126 196 106 Unit Date Jan. 1 Beginning inventory Apr. 7 Purchase Jul. 16 Purchase Oct. 6 Purchase Cost Total Cost $38 $1,748 5,040 8,428 4,664 Transaction 40 43 474 $ 19,880 For the entire year, the company sells 425 units of inventory for $56 each