Gunny bag production math problem?

Two employees work at a bag cutting machine. Together they pull polymer sheets off a large roll and pass it through an electric wire to sever the plastic. It takes 2.5 seconds to cut one side of a bag and the employees work an average of 40 hours per week. Each employee earns Kenyan Shillings 20,000 per... show more Two employees work at a bag cutting machine. Together they pull polymer sheets off a large roll and pass it through an electric wire to sever the plastic. It takes 2.5 seconds to cut one side of a bag and the employees work an average of 40 hours per week. Each employee earns Kenyan Shillings 20,000 per month.
Formula is demand per week (total hours) divided by actual unit production x 100
The chart I have in front of me is like this:
Amount
Employees 2
Hours 40
Seconds 144,000
Time 5
Production 28,800
How do you calculate the seconds?
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