Please help with part b and c. thank you

The accounting records of Kingbird Electronics show the following data (a) Your answer is correct. Determine cost of goods sold during the period under a periodic inventory system using the Fifo method Your answer is incorrect. Determine cost of goods sold during the period under a periodic inventory system using the LIFO method. Your answer is incorrect. Determine cost of goods sold during the period under a periodic irventory system using the average-cost method. (Round average-cost per unit to 3 decimal places, e.g. 12.502 and final answer to 0 decimal places, e.g. 1,250.) eTextbook and Media Last saved 1 second ago: Attempts: 1 of 3 used Saved work will be auto-submitted on the due date. Auto: submission can take up to 10 minutes