Beginning inventory is adjusted by crediting Merchandise Inventory and debiting Income Summary.

Beginning Inventory

The market value of products prepared for sale at the initiation of a bookkeeping period.

Merchandise Inventory

Goods or products that a company holds for the purpose of resale to customers, recorded as a current asset on the balance sheet.

Income Summary

is an account that aggregates all revenue and expenses during an accounting period, used to transfer the net income (or loss) to the capital account.