The Billable Hours are calculated by adding the Total man hours together for each task on the invoice.
Total man hours (for a given task) = (Task duration) * (# of techs)
(ex. Say there are 2 tasks on the invoice: Billable Hours = Total man hours of first task + Total man hours of second task)
For any additional questions, please contact SuccessWare21's support team at 888-251-2779.