The following data is available for the month of September for two items of inventory that might soon be render obsolete for Island Solutions. Inventory balances at September 1, 2023, were as follows: USB-C (TA3) Hub 200 @ $400 ea. USB-C (TB3) Hub 600 @ $800 ea.

USB-C (TA3) HUB USB-C (TB3) HUB Date Purchases Sales Date Purchases Sales Sep 5 500 @ $450 10 600 @ $900 10 500 @ $540 19 300 @ $950 15 400 @$475 25 900 @ $1 080 20 400 @ $570 28 500 @ $1 000 25 300 @ $500 30 600 @ $1 140

a. Assume that Island Solutions uses a periodic inventory system under the FIFO method, determine the cost of ending inventory and cost of goods sold at September 30, 2023, for the individual items and in total. (Show all workings)

b. Assume that Island Solutions uses a periodic inventory system under the average cost method, determine the cost of ending inventory and cost of goods sold at September 30, 2023, for the individual items and in total. (Round to 2 decimal places)