The production standard (rule of thumb) is 1,000 prints per day minus 100 for each job run.
For example:
1 Job scheduled for the day... 900 prints for the production shift.
2 Jobs... 800 prints for the day.
3 Jobs,,, 700 prints for the day.
4 Jobs... 600 prints for the day.
This will help take in account for set-up and break-down and screen making for each job.