| 摘要 |
Amounts of expendables consumed by a printer are sensed accurately. A job control unit 106 transfers a print job queued in job buffer 107 to a spooler 105, in page units. Spooler 105 sends the print job to a printer PT, as well as providing a completion determination unit 103 with notification of start of printing. Upon receiving notification of start of printing, the completion determination unit monitors the status of the printer PT and remaining data in the spooler 105, and in the event that printer PT status is "ready to print" and there is no remaining data in the spooler 105, decides that printing has completed, and counts the number of sheets of paper. An ink amount measurement unit 104, by means of predetermined correcting means, corrects the amount of ink consumed during printing, so as to approximate the amount of ink actually used in printing. A server SV is notified of the number of sheets of paper and the corrected amount of ink consumed, whereupon the server performs a billing process.
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