3. Lamareaux Inc. uses the perpetual inventory system. The following transactions took place during January 2021. Date Units 100 Unit Cost $1 S2 10 Jan. 1 Jan. 7 Jan. 9 Jan. 21 Jan. 24 Description Opening inventory Purchase #1 Sale $1 Purchase #2 Sale #2 80 20 $3 40 Instructions Calculate cost of goods sold for the January 9 and 24 sales, and ending inventory using the FIFO cost flow assumption (note creating a table in Excel would be best for this answer, see examples in the chapter PowerPoint)