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1.Last-In, First-Out (LIFO) Method[Original Blog]

One of the methods that businesses can use to calculate the cost of goods sold (COGS) is the Last-In, First-Out (LIFO) method. This method assumes that the inventory items that are purchased or produced last are the ones that are sold first. Therefore, the cost of the ending inventory is based on the older costs of the items that remain unsold. The LIFO method can have some advantages and disadvantages for businesses, depending on the nature of their inventory and the fluctuations in prices. In this section, we will explore the following aspects of the LIFO method:

1. How to calculate COGS and ending inventory using the LIFO method

2. The benefits of using the LIFO method in times of rising prices

3. The drawbacks of using the LIFO method in terms of financial reporting and taxes

4. The differences between the LIFO method and other methods such as fifo and average cost

## How to calculate COGS and ending inventory using the LIFO method

To apply the LIFO method, we need to keep track of the costs of the inventory items that are purchased or produced in each period. Then, we need to assign the costs of the items that are sold in each period based on the most recent costs of the items that are available. The formula for calculating COGS using the LIFO method is:

$$\text{COGS} = \text{Beginning inventory} + \text{Purchases} - \text{Ending inventory}$$

The ending inventory is calculated by subtracting the costs of the items that are sold from the total costs of the items that are available. For example, suppose a business has the following inventory transactions in a year:

| Period | Units | Cost per unit | Total cost |

| Beginning inventory | 100 | $10 | $1,000 |

| Purchase in January | 50 | $12 | $600 |

| Purchase in February | 40 | $15 | $600 |

| Purchase in March | 30 | $18 | $540 |

| Sale in April | 150 | | |

To calculate the COGS and the ending inventory using the LIFO method, we need to assign the costs of the 150 units that are sold in April based on the most recent costs of the items that are available. Therefore, we start with the 30 units that are purchased in March at $18 per unit, then the 40 units that are purchased in February at $15 per unit, and finally the 80 units that are purchased in January or earlier at $10 or $12 per unit. The calculation is as follows:

| Period | Units sold | Cost per unit | Total cost |

| March | 30 | $18 | $540 |

| February | 40 | $15 | $600 |

| January or earlier | 80 | $10 or $12 | $880 |

| Total | 150 | | $2,020 |

The COGS using the LIFO method is:

$$\text{COGS} = \text{Beginning inventory} + \text{Purchases} - \text{Ending inventory}$$

$$\text{COGS} = \$1,000 + \$1,740 - \$720$$

$$\text{COGS} = \$2,020$$

The ending inventory using the LIFO method is:

$$\text{Ending inventory} = \text{Beginning inventory} + \text{Purchases} - \text{COGS}$$

$$\text{Ending inventory} = \$1,000 + \$1,740 - \$2,020$$

$$\text{Ending inventory} = \$720$$

The ending inventory consists of 20 units that are purchased in January or earlier at $10 or $12 per unit.

## The benefits of using the LIFO method in times of rising prices

One of the benefits of using the LIFO method is that it can reduce the taxable income and the income tax expense of a business in times of rising prices. This is because the LIFO method assigns the higher costs of the items that are sold to the COGS, which lowers the gross profit and the net income. The lower net income means that the business pays less income tax, which can improve its cash flow and liquidity. For example, suppose the business in the previous example has a tax rate of 25%. The income tax expense using the LIFO method is:

$$ ext{Income tax expense} = ext{Tax rate} \times \text{Net income}$$

$$\text{Income tax expense} = 0.25 \times (\text{Sales} - \text{COGS})$$

$$\text{Income tax expense} = 0.25 \times (150 \times \$20 - \$2,020)$$

$$\text{Income tax expense} = \$245$$

The net income after tax using the LIFO method is:

$$\text{Net income after tax} = \text{Sales} - \text{COGS} - \text{Income tax expense}$$

$$\text{Net income after tax} = 150 \times \$20 - \$2,020 - \$245$$

$$\text{Net income after tax} = \$735$$

If the business uses another method, such as the FIFO method, which assigns the lower costs of the items that are sold to the COGS, the income tax expense and the net income after tax would be higher. For example, using the FIFO method, the COGS would be $1,500, the income tax expense would be $375, and the net income after tax would be $975. Therefore, by using the LIFO method, the business can save $130 in income tax expense and have more cash available.

## The drawbacks of using the LIFO method in terms of financial reporting and taxes

One of the drawbacks of using the LIFO method is that it can distort the financial statements of a business and make them less comparable with other businesses that use different methods. This is because the LIFO method does not reflect the current market value of the inventory, but rather the historical costs of the items that are purchased or produced earlier. The ending inventory using the LIFO method may be significantly undervalued, which lowers the total assets and the equity of the business. This can affect the financial ratios and indicators that are based on the balance sheet, such as the current ratio, the inventory turnover ratio, and the return on equity. For example, suppose the business in the previous example has the following balance sheet items:

| Item | Amount |

| Current assets | $2,000 |

| Current liabilities | $1,000 |

| Total assets | $5,000 |

| Total liabilities | $2,000 |

| Equity | $3,000 |

The current ratio using the LIFO method is:

$$\text{Current ratio} = \frac{\text{Current assets}}{ ext{Current liabilities}}$$

$$\text{Current ratio} = \frac{\$2,000}{\$1,000}$$

$$\text{Current ratio} = 2$$

The inventory turnover ratio using the LIFO method is:

$$ ext{Inventory turnover ratio} = rac{ ext{COGS}}{ ext{Average inventory}}$$

$$\text{Inventory turnover ratio} = \frac{\$2,020}{\frac{\$1,000 + \$720}{2}}$$

$$\text{Inventory turnover ratio} = 2.32$$

The return on equity using the LIFO method is:

$$\text{Return on equity} = \frac{\text{Net income after tax}}{ ext{Equity}}$$

$$\text{Return on equity} = \frac{\$735}{\$3,000}$$

$$\text{Return on equity} = 0.245$$

If the business uses another method, such as the FIFO method, the ending inventory would be $1,240, the current assets would be $2,520, the total assets would be $5,520, and the equity would be $3,520. The current ratio would be 2.52, the inventory turnover ratio would be 1.45, and the return on equity would be 0.277. Therefore, by using the LIFO method, the business may appear to have lower liquidity, higher efficiency, and lower profitability than it actually does.

Another drawback of using the LIFO method is that it can create some tax complications and disadvantages for a business. This is because the LIFO method is not widely accepted by the tax authorities in many countries, such as Canada, the United Kingdom, and most of the European Union. Therefore, a business that uses the LIFO method for its financial reporting may have to use another method, such as the FIFO method, for its tax reporting. This can create a discrepancy between the reported income and the taxable income, which may require the business to maintain two sets of records and reconcile the differences. Moreover, the business may lose some of the tax benefits of using the lifo method if the tax rates change or if the business operates in multiple jurisdictions with different tax rules.

## The differences between the LIFO method and other methods such as FIFO and average cost

The LIFO method is one of the three main methods that businesses can use to calculate the COGS and the ending inventory. The other two methods are the First-In, First-Out (FIFO) method and the average cost method. The FIFO method assumes that the inventory items that are purchased or produced first are the ones that are sold first. Therefore, the cost of the ending inventory is based on the newer costs of the items that remain unsold.

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