An auditor is reviewing the non-current assets of a manufacturing company. To verify the 'existence' assertion for the machinery, which of the following audit procedures would be the MOST appropriate?
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A
Reviewing the depreciation calculation for a sample of machines.
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B
Inspecting the supplier invoices for machines purchased during the year.
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C
Physically inspecting the machines on the factory floor and agreeing them to the non-current asset register.
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D
Enquiring with the production manager about the operational status of the machines.