Please explain how you got the answer as well, thanks!

Question 1 Swifty Company sells one product. Presented below is information for January for Swifty Company. Jan. 1 Inventory 107 units at $5 each 84 units at $8 each 146 units at $6 each 118 units at $9 each 153 units at 7 each 4 Sale 11 Purchase 13 Sele 20 Purchase 27 Sale 89 units at $10 each Swifty uses the FIFO cost flow assumption. All purchases and sales are on account. (a) Assume Swifty uses a periodic system. Prepare all necessary journal entries, including the end-of-month closing entry to record cost of goods sold. A physical count indicates that the ending inventory for January is 115 units. (Ir no entry is required, select "No entry" for the account tities and enter 0 for the amounts. Credit account titles are automatically indented when amount is entered. Do not indent manually.) Date Account Titles and Explanation Debit Credit Jan. 31