Respond to the following in a minimum of 175 words:

As auditors move from the planning phase to the fieldwork phase of an audit, they recognize they will not be able to test all transaction in order to offer their opinion on the financial statements. Therefore, various sampling techniques and principles have been developed to assist the auditor in providing adequate coverage and a reliable opinion using samples of transactions.

Discuss audit sampling for tests of details of balances and for tests of controls and substantive tests of transactions. How do they differ?