Classify each of the presented audit procedures according to the following types: $(1)$ inspection or physical examination, $(2)$ confirmation, $(3)$ inspection of documents, $(4)$ analytical procedures, $(5)$ inquiries of the client, $(6)$ recalculation, $(7)$ reperformance, and $(8)$ observation.

There is one answer per procedure:

Audit Procedure

Type of Procedure

Review the accounts receivable with the credit manager to evaluate their collectability.

Compare a duplicate sales invoice with the sales journal for customer name and amount.

Count inventory items and record the amount in the audit files.

Obtain a letter from the client$$s lawyer addressed to the CPA firm stating that the attorney is not aware of any existing lawsuits.

Use an ATT to extend the cost of inventory times the quantity on an inventory listing to test whether it is accurate.

Obtain a letter from an insurance company to the CPA firm stating the amount of the fire insurance coverage on buildings and equipment.

Examine an insurance policy stating the amount of the fire insurance coverage on buildings and equipment.

Calculate the ratio of cost of goods sold to sales as a test of overall reasonableness of gross margin relative to the preceding year.

Obtain information about internal control by requesting that the client fill out a questionnaire.