An entry which is made on both sides of a cash book is called Contra entry. In the dual entry accounting system, a Contra Entry is an entry which is recorded to reverse or offset an entry on the other side of an account. If a debit entry is recorded in an account, it will be recorded on the credit side and vice-versa.
A cash book with cash, bank and discount column is commonly referrred to as
A cash book with cash, bank and discount column is commonly referrred to as Three columns cash book. The three column cash book (also known as triple column cash book) has three money columns on both debit and credit side – one on each side for recording discount, cash and bank amounts.
Cash book records Cash payments and cash receipts. A Cash Book is a type of subsidiary book where cash (or) bank receipts and cash (or) bank payments made during a period are recorded in a chronological order.