| 摘要 |
The invention provides an expense management system that has an input for receiving an input signal containing document print information. The document print information is of the type such that when supplied to a printer device will cause the printer device to print multiple specimens of a document that can be a single page or several pages. The expense management system includes a processing unit that processes the input signal to derive from the print information the number of document specimens that will be generated by the printer device. On the basis of the value X - Y, the processing unit generates billing data, useful for producing an invoice for the usage of the printer device. The variable X is the number of document specimens that will be generates by the printer while the variable Y is a positive integer.
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