The required provision is 4% of £12,000, which equals £480. Since the existing provision is £600, there is an excess of £120. To reduce the provision, we debit the provision account and credit the Profit and Loss account.

Doubtful debts refer to accounts receivable that the business expects may not be collected. These are distinct from 'bad debts,' which are accounts already confirmed as uncollectible. Businesses often create a provision for doubtful debts to account for this uncertainty in their financial statements.

A provision for doubtful debts is an expense account. When a business decreases this provision, it effectively reduces the bad debt expense for the period. Since expenses are deducted from revenue to calculate net income, a lower expense results in a higher net income. This adjustment reflects a more optimistic assessment of the collectability of trade receivables.

The required provision is 2% of $20,000, which equals $400. Since the existing provision is $500, the account must be reduced by $100. Reducing a provision account requires a debit entry to the provision account and a credit to the income statement.

The provision for cash discount is calculated only on the amount of debtors expected to actually pay their debts. Therefore, one must first deduct the provision for doubtful debts from the total debtors to arrive at the net realizable value, and then apply the discount percentage to that remaining balance.

A reserve for discounts on accounts payable is created to anticipate future discounts. When this reserve is adjusted or reversed, the entry involves debiting the reserve account and crediting the Profit and Loss account. This effectively recognizes the discount as an income or a reduction in expenses, aligning with the accrual principle of accounting by matching the expected benefit to the relevant period.

A prepaid expense represents a payment made in advance for goods or services to be received in the future. Since the business has a right to receive these benefits, it is classified as an asset on the balance sheet. Note: The provided answer 'C' (Income) is factually incorrect in standard accounting, as prepaid expenses are assets.

Prepaid expenses represent payments made in advance for services or goods to be received in future periods. On the Balance Sheet, they are reported as current assets. The valuation is based on the unexpired portion of the cost. As time passes or the benefit is consumed, the expense is recognized in the Profit and Loss account, and the asset value on the Balance Sheet is reduced accordingly.

Postage stamps on hand represent an asset because they are supplies that have been purchased but not yet consumed. In accounting, these are treated as prepaid expenses because the business has paid in advance for a service that will be utilized in future operations.

Prepaid expenses are costs paid in advance that have not yet been consumed. To adjust the accounts, we debit the asset account 'Prepaid Expenses' to recognize the future benefit and credit the 'Expenses' account to reduce the current period's expense, ensuring the matching principle is followed.