Vaughn Company sells one product. Presented below is information for January for Vaughn Company. Jan. 1 Inventory 115 units at $5 each 4 Sale 91 units at $8 each 11 Purchase 156 units at $7 each 13 Sale 128 units at $9 each 20 Purchase 155 units at $7 each 27 Sale 95 units at $10 each Vaughn uses the FIFO cost flow assumption. All purchases and sales are on account. (a) Assume Vaughn 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 112 units. (If no entry is required, select "No entry" for the account titles and enter O for the amounts. Credit account titles are automatically indented when amount is entered. Do not indent manually. List all debit entries before credit entries.)