An electronic scale integrally formed within the housing of a piece of office equipment increases a user's work space in a home or business environment. The piece of equipment may be a personal computer or one of its peripheral devices. A mailing system automatically computes postal and/or private carrier rates for items of mail based on weight signals derived from the electronic scale. Since the scale is integrated into the computer, all mailing tasks are performed at a user's desk using the least space possible. The system is performed in accordance with a computer program which steps a user through the postage-computing method using one or more interactive display screens.