The periodic inventory system relies on a physical count of inventory at the end of the accounting period to determine the cost of goods sold and the ending inventory balance, as it does not track inventory movements continuously.

In a perpetual inventory system, inventory levels are updated continuously. When goods are purchased on credit, the inventory account is debited directly to reflect the increase in stock, and accounts payable is credited to reflect the liability. This differs from the periodic system, which uses a 'Purchases' account. This method ensures that the inventory balance is always current and reflects the actual stock on hand.

The First-In, First-Out (FIFO) method assumes that the oldest items in inventory are sold first. Consequently, the remaining inventory consists of the most recently purchased items, which are valued at costs that are generally closer to current market prices compared to older costs used in LIFO or average cost methods.

During inflationary periods, the First-In, First-Out (FIFO) method assumes that the oldest, cheaper inventory items are sold first. This results in a lower Cost of Goods Sold (COGS) and consequently a higher gross profit. Since taxable income is based on profit, FIFO leads to higher taxable income compared to LIFO or average cost methods.

The First-In, First-Out (FIFO) method assumes that the oldest inventory items are sold first. Consequently, the remaining inventory consists of the most recently purchased items, which typically reflect current market costs. This makes the ending inventory valuation more representative of current replacement costs compared to methods that rely on older historical costs, such as LIFO or weighted average cost.

Under the FIFO (First-In, First-Out) method, the oldest and typically cheaper costs are assigned to the Cost of Goods Sold (COGS) when prices are rising. Lower COGS results in a higher gross profit and, consequently, a higher net income compared to the LIFO method, which assigns more recent, higher costs to COGS.

The First-In, First-Out (FIFO) method assumes that the oldest inventory items are sold first. During inflationary periods, older, cheaper costs are matched against current revenues, resulting in a lower Cost of Goods Sold (COGS). Consequently, this leads to higher gross profit and, ultimately, higher taxable income compared to other methods like LIFO.

Financial accounting primarily provides information to external parties like investors, creditors, and government agencies. Managers are internal users who rely on management accounting for day-to-day operational decisions, though they may also review financial accounting reports.

Directors are considered primary users of accounting information because they are responsible for the management and strategic direction of the company. They have a direct financial interest and fiduciary duty to monitor the company's performance, financial health, and compliance, which is essential for effective decision-making and governance.

External users are individuals or entities outside the organization who rely on financial statements to make economic decisions. Creditors, such as banks or suppliers, use these statements to assess the creditworthiness and liquidity of the business, whereas managers, CEOs, and controllers are internal users.