A periodic, FIFO B perpetual, FIFO C periodic, weighted average D perpetual, weighted average

Q 6.20: A merchandising company had the following purchases and sales for the month of September: Unit Total Units Cost ($) Cost ($) 01-Sep Beg. Inventory 150 60.00 9,000 10-Sep Purchase 300 63.00 18,900 12-Sep Sales (400) 15-Sep Purchase 100 62.00 6,200 26-Sep Purchase 350 61.00 21,350 30-Sep Sales (300) If they valued their ending inventory at $12,322.22, what inventory system were they using, and what cost determination method were they using, respectively