The 18.19/14.7 numbers were days off, not work days.
In a 35 day month we have an average of 18.19 days off/16.81 work days
In a 28 day month we have an average of 14.70 days off/13.30 work days
I guess a more accurate way to figure it is:
4-35 day months @ 18.19 days off average is 72.76 days off
8-28 day months @ 14.70 days off average is 117.6 days off
72.76+117.6=190.36 days off per year.
190.36/12=15.9 days off each month.
Papa
I think I need another beer................