In the case of Specific Example 1, the remaining amount of the rolled paper #1 mounted to the image forming apparatus 10 is longer than the total sum of the paper travel distances of the four print jobs #1 to #4.

However, the remaining amount of the rolled paper #1 may be short of the paper travel distance of a newly added print job. This case corresponds to a case where a positive result is obtained in step S3 (see FIG. 3).

FIG. 10 illustrates a case where the remaining amount of rolled paper #1 is short of the paper travel distance of the fourth print job #4.

In the case where the remaining amount of the rolled paper #1 at the time when the print jobs #1 to #3 are added to the print list is less than 200 meters, the print job #4 may not be executed using the rolled paper mounted.

Therefore, the print job #4 is allocated to a roll of rolled paper #2 that is different from that for the print jobs #1 to #3.

Estimations of the print speed and the job execution time of the print jobs #1 to #3 remain the same as those in the display example in FIG. 8.

While Specific Examples 1 and 2 assume a case where the attributes of paper are the same, there may be a case where the attributes of paper for use in a print job which has been read out are different from the attributes of paper for use in the preceding print job. This case corresponds to a case where a positive result is obtained in step S2 (see FIG. 3).