It's not just shifting costs. Maybe you trade say 1-3 units of time of caller for say 9x 1 units of time of attendees, for a 9/3 = 3x or more savings. Callers

It's not just shifting costs. Maybe you trade say 1-3 units of time of caller for say 9x 1 units of time of attendees, for a 9/3 = 3x or more savings. Callers tend to have higher salary, but usually way less than the people count multiplier.