can you explain each stop please

Assume that BR Toys store bought and sold a line of dots during December as follows: (Click the icon to view the transactions.) BR Toys uses the perpetual nventory system Read the requirements Requirement 1. Compute the cost of goods sold, cost of ending merchandise inventory, and gross profit using the FIFO inventory costing method. Begin by computing the cost of goods sold and cost of ending merchandise Inventory using the FIFO inventory costing method. Enter the transactions in chronological order, calculating new inventory on hand balance ater each transaction Once all of the transactions have been entered into the perpetual record, calculate the quality and total cost of merchandise inventory purchased, sold, and on hand at the end of the period. (Cerite oldest inventory layers first Purchases Cost of Goods Solid Inventory on Hand Unit Total Unit More Info Date Quantity Cest Cost Quantity Cost Cost Quantity Cost Cost Total Unit Total 13 5 11 each Dec Dec. 1 Beginning merchandise inventory 8 Sale 14 Purchase 21 Sale Dec. 14 14 US 13 each 1) Units @ $2 each Dec. 21 Print Done Totals 7 Enter any number in the edit fields and then click Check Answer Check Answ Clear A parts remaining MacBook Pro % 5 B 7 6 47 3 4 Z C 70 T E 3 H G D s M N B