A document submission management system calculates predicted values of the amount of consumption of consumables used for printing processing according to an order from a user, estimates the cost of the printing processing based on the predicted values, and transmits the estimated cost to a client terminal of the user. A user interface allowing placement of an order briefly displays the cost for a print option. For the cost estimate, the cost of printing form data used in printing processing is registered in advance in a memory in the document submission management system, so that time required for the calculation of the estimate is reduced.