To provide a system and a method for imparing charge in network printer that can avoid the concentration of print jobs to a single printer by changing an imposed charge calculating method for the other printer.

When executing the change of a calculation parameter through panel operation in a step S601, in a step S602, it is inquired to a user whether or not the calculation parameter of a calculation program is to be changed, a change menu is presented to the user and the change of the calculation parameter is inputted. When changing no calculation parameter, in a step S603, the calculation module is read so that a substitutive calculation program is run.