is beginning inventory a debit
Prepare an adjustment for merchandise inventory under the periodic inventory system. The adjustment for merchandise inventory under the periodic inventory system re-. quires two adjusting entries. In the first adjusting entry (to remove the beginning in-. ventory), debit Income Summary and credit Merchandise Inventory. In the second. adjusting entry (to enter the ending inventory), debit Merchandise Inventory and. credit Income Summary. 3. Prepare an adjustment of unearned revenue. For revenue received in advance, an adjustment is required to separate the portion. that has been earned from the portion that is unearned.