Patent ID: 7992768

Claim:
A cash register tray, comprising: a base tray having a plurality of change compartments; a plurality of weight sensors, each said weight sensor being configured to determine content weight of a respective change compartment; a processor in data communication with each said weight sensor; a data output device in data communication with said processor; a data input device in data communication with said processor; means for powering said processor, said weight sensors, and said data output device; and programming in said processor for: associating each said compartment with a respective monetary denomination and a respective predetermined value based thereon; associating a respective initial value with each said compartment; associating a respective content weight with each said compartment using data from said weight sensors; adding a predetermined monetary value to said initial value of a respective compartment upon: (a) receiving data from said data input device indicating change has been added to said respective compartment; and (b) detecting an increase in content weight for said compartment using said weight sensor and determining that said increase in content weight is within a predetermined range related to said monetary denomination of said compartment; adding a determined monetary value to said initial value and any said added predetermined monetary value of a respective compartment upon: (a) detecting an increase in content weight for said compartment using said weight sensor; and (b) dividing said increase in content weight by said predetermined value for said compartment and rounding the result to the nearest whole number; said determined monetary value being said nearest whole number or a value associated therewith; and subtracting a determined value from a sum of said initial value, any said added predetermined monetary value, and any said added determined monetary value of a respective compartment upon: (a) detecting a decrease in content weight for said compartment using said weight sensor; and (b) dividing said decrease in content weight by said predetermined value for said compartment and rounding the result to the nearest integer; said determined value being said nearest integer or a value associated therewith; and actuating said data output device to display said initial value plus any added predetermined monetary value plus any added determined monetary value minus any subtracted determined value for at least one said compartment.