13 Vulcan SC 350 user

Let us calculate the 13 Vulcan SC-350 customer has good business or not?
The customer runs the Vulcan SC-350 average 8 hours per day, 26 days per month, average 20 seconds per sheet with one Vulcan SC-350 and average net profit of 0.1USD per sheet.
39 sheets x 0.1USD = 3.9USD per minute
3.9USD x 60 minutes = 234USD per hour
234USD x 8 hours = 1,872USD per day
1,872USD x 26 days = 48,672USD per month
Half million US Dollar per year, it’s very good business, worth to invest in the Vulcan SC-350.