The following table shows a four-step process. The necessary time for one worker to perform eachtaskon one unit is listed as well as the number of workers at each step. Available materials are limited to the amount sufficient for 5.4 units per hour and average hourly demand is 7.1 units.

What is the actual hourly output of this process?

Step	Task Time in Minutes	# Workers
1	3	3
2	4	1
3	9	2
4	7	3