Accounting Principles and Practices

 a) This error is not an error of omission as the entry has not been omitted.  b) This error will not effect the trial balance as the amount recorded is correct.  c) It will affect the net profi as wrong account has been debited.  

Free samples account is used to record the cost of free samples distributed for advertising/promotion purposes. Since it records an expense (advertising expense), it's a nominal account (temporary account that gets closed at period end). It's not a personal account (not for people) or real account (not for permanent assets). Option D is unnecessary.

When balancing an account, the difference between the two sides is written on the side with the smaller total. This balance is then carried forward to the opposite side on the next page. The balance makes both sides equal in total.

Goods misappropriated by an employee is treated as an expense or loss to the business. Nominal accounts include all expenses, losses, incomes, and gains. Since misappropriation represents a loss, it's recorded in a nominal account.

Goodwill is an intangible asset representing the reputation and brand value of a business. It appears on the assets side of the balance sheet and is classified as an asset account.

A double column cash book records both cash and bank transactions. Since cash transactions are already recorded in the cash book, maintaining a separate cash account in the ledger would be duplication and is therefore unnecessary.

Journal proper (journal paper) is used for transactions that cannot be recorded in subsidiary books. Returns of fixed assets purchased on credit requires a journal entry: Asset Account debited (for returns) and Supplier Account credited, which goes through the journal proper.

Books of original entry (also called primary books or journals) are where transactions are first recorded in chronological order. The ledger is the book of final entry where classified accounts are maintained, not a book of original entry. Options A, C, and D are all books of original entry used to record specific types of transactions.

When goods sold on credit are returned by a customer, this is recorded in the sales return book to track returns. However, when cash is immediately given in exchange for the returned goods, the cash payment must be recorded in the cash book as well. Both books are needed to capture the complete transaction - the return aspect and the immediate cash settlement.

Subsidiary ledgers contain detailed individual account information such as quantities of specific products sold, individual customer balances, or specific supplier amounts. The general ledger only shows aggregate totals and summary figures, not granular details like the quantity of a particular product sold. Product-level quantity data is maintained in inventory subsidiary ledgers or sales records, not visible in the general ledger.

When machinery is incorrectly debited to purchase account, we need to reverse the wrong entry and pass the correct one. The purchase account was wrongly debited, so we credit it to cancel that entry. Machinery is an asset that should be debited when acquired. Hence, the rectification entry is: Dr. Machinery a/c and Cr. Purchase a/c.

An error of principle occurs when a transaction is recorded in violation of the fundamental accounting principles. Dishonour of a bill is a financial matter that should not be treated as a general expense. Recording it in general expenses account violates the principle of classifying transactions by their nature - it's a receivable issue, not an operating expense.

A trial balance is a statement that lists all ledger account balances (both debit and credit) on a particular date. Its primary purpose is to verify the arithmetic accuracy of posting - that total debits equal total credits. The P&L account and balance sheet are financial statements, not lists of ledger balances. An earning statement is another term for P&L.