The Cash Book is a specialized journal used to record all cash receipts and cash payments. Since the sale of furniture for cash involves an immediate inflow of cash, it must be recorded in the Cash Book, regardless of whether the item sold is inventory or a fixed asset.

A cash book is considered a book of original entry because transactions are recorded in it first, acting as a journal. Simultaneously, it serves as a ledger account for cash and bank balances, as it maintains a running balance of these items, thus fulfilling both roles.

In a double-entry bookkeeping system, the Cash Book is the book of original entry for all cash transactions. Regardless of whether the transaction is a sale or a purchase, if cash is involved, it must be recorded in the Cash Book. The Sales Book is reserved exclusively for credit sales; therefore, a cash sale is recorded in the Cash Book to ensure that the cash inflow is properly tracked.

The Cash Book is strictly reserved for transactions involving the actual movement of cash or bank balances. Credit transactions, such as credit purchases, credit sales, and outstanding expenses, do not involve immediate cash flow and are therefore recorded in other subsidiary books like the Purchases Book, Sales Book, or Journal Proper.

The Cash Book is a specialized book of original entry designed to record all cash receipts and cash payments. Since the payment of salary involves an outflow of cash, it is recorded directly in the payments side of the Cash Book rather than in the General Journal.

A cash book is a subsidiary book used to record all cash receipts and payments. It is classified into various types based on the number of columns, including single column (cash only), double column (cash and bank or cash and discount), and triple column (cash, bank, and discount). Since all listed options are valid formats, 'All of the above' is the correct choice.

A postdated check cannot be cashed immediately; therefore, it does not represent current cash or bank balance. It is treated as a receivable until the date on the check arrives, at which point it can be deposited.

The cash book is a primary book of entry maintained by the business entity itself to record all cash and bank transactions chronologically. It is the responsibility of the business's accountant or bookkeeper to ensure that all receipts and payments are accurately recorded in the cash book to maintain an up-to-date record of liquid assets.

The question implies a cash purchase of machinery. In accounting, the purchases book is used only for credit purchases of goods intended for resale. Since the transaction is for cash, it must be recorded in the cash book regardless of whether the item is inventory or a fixed asset. The cash book captures all cash outflows, including asset acquisitions.

The purchase of office equipment using cash is a transaction that results in a decrease in the business's cash balance. According to standard accounting practices, all cash outflows, including the acquisition of fixed assets like equipment, must be recorded on the credit side of the cash book, which is the side designated for payments.