particular pattern for how costs flow through inventory. Physical flow and cost flow need not be the
same.
1. First-In, First-Out (FIFO)—assumes costs flow in the order incurred. (Results are identical under
the periodic and perpetual systems.)
2. Last-In, First-Out (LIFO)—assumes costs flow in the reverse order incurred. (Results differ from
perpetual in the appendix because the periodic method applies its computation at period-end only
versus the perpetual method that applies its computation at each sale.)
B. Under the perpetual inventory system, Merchandise Inventory is updated for each purchase and sale of
inventory. Cost of goods available for sale must be allocated between cost of goods sold and ending
inventory.
1. Specific identification—Each item can be identified with a specific purchase and invoice. Specific
identification is usually only practical for companies with expensive, custom-made inventory.
2. First-in, first-out (FIFO)—Assumes costs flow in the order incurred.
C. Financial Statement Effects of Costing Methods
1. Rising Costs—when purchase costs regularly rise:
a. FIFO reports lowest cost of goods sold and highest gross profit and net income.
b. LIFO reports highest cost of goods sold and lowest gross profit and net income.
c. Weighted average results are between FIFO and LIFO.
3. Method Advantages:
a. FIFO—inventory on balance sheet approximates its current cost and better matches current costs
with revenues.
D. Tax Effects of Costing Methods
Since inventory costs affect net income, they have potential tax effects.
1. Computing the Lower of Cost or Market—Market in the term LCM is replacement cost for LIFO,
but net realizable value for the other three methods.
2. A decline in market value means a loss of value in inventory