Real-life math (story)problem. Do possibilities exist for scheduling 4 people (one rotating), working at a 24-hr operation, on 8-hr shifts five consecutive days per week? Week=Monday-Sunday. OT 1 shift/week or 4.3/month accepted by the boss.

There are 21 work periods in a 7 day week.
Four people are capable of doing 20 shifts without overtime. So each week one person would have to do 6 shifts a week.