The document defines a trial balance as a statement showing the debit and credit balances from the ledger. It helps ensure arithmetic accuracy and facilitates preparing final accounts. A trial balance operates under the basic principle of double-entry bookkeeping, where assets and expenses have debit balances while liabilities and incomes have credit balances. Preparing a trial balance allows a business to check arithmetic accuracy, identify errors if the trial balance does not balance, and obtain summarized account information to help in financial statement preparation. There are three common methods for preparing a trial balance - the totals method, balances method, and totals-cum-balances method.