Income Potential The Therajet System should be charged on a per session basis, where the duration may be varied from 10-60 mins per treatment. Example: Usage based on £2 per minute, treatment based on 20 mins Two sessions per hour for 8 hours per day = £640 per day income x 5 days = £3,200 - x22 days = £14,080 - x 260 days = £166,400 Usage based on £1.50 per minute, treatment based on 20 mins Two sessions per hour for 8 hours per day =£480 per day income X 5 days = £2,400 - x 22 days =£10,560 - x 260 days = £124,800