86. Auditing the valuation assertion for inventory of a client utilizing the FIFO cost ow assumption will require the auditor to examine which of the following? A. Invoices representing the more recent purchases of inventory. B. Invoices representing the purchase of base year inventory in the year of inception. C. Shipping documents for a sample of cost of goods sold transactions during the year. D. Shipping documents for a sample of units on hand in the interim period