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Cycle inventory. First of all, we need to go through the idea of economic order quantity (EOQ). [6] EOQ is an attempt to balance inventory holding or carrying costs with the costs incurred from ordering or setting up machinery. The total cost will minimized when the ordering cost and the carrying cost equal to each other.
The figure graphs the holding cost and ordering cost per year equations. The third line is the addition of these two equations, which generates the total inventory cost per year. The lowest (minimum) part of the total cost curve will give the economic batch quantity as illustrated in the next section.
There is a setup cost s t incurred for each order and there is an inventory holding cost i t per item per period (s t and i t can also vary with time if desired). The problem is how many units x t to order now to minimize the sum of setup cost and inventory cost. Let us denote inventory:
This figure graphs the holding cost and ordering cost per year equations. The third line is the addition of these two equations, which generates the total inventory cost per year. This graph should give a better understanding of the derivation of the optimal ordering quantity equation, i.e., the EPQ equation
The difference between the cost of an inventory calculated under the FIFO and LIFO methods is called the LIFO reserve (in the example above, it is $750, i.e. $5250 - $4500). This reserve, a form of contra account , is essentially the amount by which an entity's taxable income has been deferred by using the LIFO method.
Cost of goods sold (COGS) is the carrying value of goods sold during a particular period. Costs are associated with particular goods using one of the several formulas, including specific identification, first-in first-out (FIFO), or average cost. Costs include all costs of purchase, costs of conversion and other costs that are incurred in ...
Two very popular methods are 1)- retail inventory method, and 2)- gross profit (or gross margin) method. The retail inventory method uses a cost to retail price ratio. The physical inventory is valued at retail, and it is multiplied by the cost ratio (or percentage) to determine the estimated cost of the ending inventory.
The typical cost of carrying inventory is at least 10.0 percent of the inventory value. So the median company spends over 1 percent of revenues carrying inventory, although for some companies the number is much higher. [4] Also, the amount of inventory held has a major impact on available cash.