Give examples of specific companies that you would logically think should use each of the following inventory valuation methods (at least one company per method):

-Specific identification

-First-in, First-out (FIFO)

-Last-in, First-out (LIFO)

-Weighted average cost

Now identify reasons that a company may not use the most obvious logical cost flow valuation method, hence, the reason these are considered cost flow assumptions.