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The Ativa Checkbook Calculator™ has been carefully designed to help you keep track of your personal finances. Checking and savings account information can now easily be calculated, stored and updated at the touch of a button. The Ativa Checkbook Calculator™ can also be used to monitor your personal budget or expense records. With three independently constant memory paths, the Ativa Checkbook Calculator™ saves your account information even when the unit is in OFF mode. 1. First, pull out the plas