Sum hours on invoices

Many of my clients want to see a total of how many hours I am billing for, at a glance.

It would be helpful to print a sum of the hours billed on all sales invoices, or at least on those invoices that contain only hourly billed items (i.e., invoices that use the template with an “Hours” column).

To facilitate this, it might also be nice to have the option to separate Hourly Services from Other Services on invoices, each section with its own subtotal.

Yeah, this will be solved when sub-totals within invoices will be implemented.