I hope my explanation helps you.
As long as auditor finds ending balance of the inventory he can give unmodified opinion on Balance sheet only, but disclaim an opinion on other statements because, Income stat. has COGS which is the result of opening balance + purchases – Ending balance (because auditor can't find opening bal. at the beg of the year he can't express any opinion on income statement. Then from Income statement, Net income ties to Stockholder's equity and also affects the statement of cash flows. Therefore Auditor can't express an opinion on other statements except balance sheet.
In circumstances where a scope limitation prevents an auditor from obtaining sufficient appropriate audit evidence regarding an item that does not affect the ending balance of a balance sheet account, the auditor may issue an unmodified opinion in regard to financial position and disclaim an opinion in regard to the results of operations and cash flows.
AUD :56, 72, 77!
FAR : 74, 77!
BEC : 72, 75!
REG : 72, 81!