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The perpetual system records revenue each time a sale is made. Determining the cost of goods sold requires taking inventory. The most commonly used inventory valuation methods under a perpetual system are: first-in first-out (FIFO) last-in first-out (LIFO) (highest in, first out) (HIFO) average cost or weighted average cost
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.
Perpetual inventory systems can still be vulnerable to errors due to overstatements (phantom inventory) or understatements (missing inventory) that can occur as a result of theft, breakage, scanning errors or untracked inventory movements, leading to systematic errors in replenishment. [2] The perpetual inventory formula is very straightforward.
FIFO treats the first unit that arrived in inventory as the first one sold. LIFO considers the last unit arriving in inventory as the first one sold. Which method an accountant selects can have a significant effect on net income and book value and, in turn, on taxation.
Average cost method is a method of accounting which assumes that the cost of inventory is based on the average cost of the goods available for sale during the period. [1]The average cost is computed by dividing the total cost of goods available for sale by the total units available for sale.
The main difference between the periodic inventory and the perpetual inventory is that the perpetual inventory does not keep the inventory-balance by using the inventory accounts, instead the entire input is booked immediately on the expense accounts. The principle is the following: output= initial inventory + input - final inventory
FIFO's opposite is LIFO, last-in-first-out, where the youngest entry or "top of the stack" is processed first. [2] A priority queue is neither FIFO or LIFO but may adopt similar behaviour temporarily or by default. Queueing theory encompasses these methods for processing data structures, as well as interactions between strict-FIFO queues.
In finance, a perpetual futures contract, also known as a perpetual swap, is an agreement to non-optionally buy or sell an asset at an unspecified point in the future. . Perpetual futures are cash-settled, and differ from regular futures in that they lack a pre-specified delivery date, and can thus be held indefinitely without the need to roll over contracts as they approach expi