We'll assume that the Inventory was purchased with Cash.
Income Statement: No changes to the Income Statement.
Cash Flow Statement: Because inventory is an asset, we know that it decreases Cash Flow from Operations by $10. Net change in Cash at the bottom of the CFS also decreases by $10.
Balance Sheet: On the Assets side, Inventory increases by $10 but Cash decreases by $10, so they cancel each other out. No change to Liabilities and Shareholder's Equity and the Balance Sheet balances.