A consumables stock subtraction processing unit in a management apparatus calculates a counter value used in the determination of stock subtraction for a consumable product by using the value of a counter included in a residual amount notification acquired from an image formation apparatus. When the difference of the determination counter value calculated upon receipt of a previous residual amount notification and a determination counter value calculated upon receipt of a new residual amount notification is greater than or equal to a predetermined value, stock subtraction processing for the consumable is performed.