Let's make it more fun:
Annual salary / (2085 + total annual commute time)
2085 = 5/7 (365) * 8
edit: since a typical full-time non-salaried employee's day is 8 hours long, but 1/2 hour lunch isn't paid for, 5/7 (365)*7.5 = 1955
Approx 261 weekdays in the year.
I work from home 1 weekday per week ...
6 holiday (assume 3 are the day I work at home since they make all holidays Mon or Fri, and I work from home on Fri)
15 vacation days (assume 3 are the day I work at home)
2 floating holidays ...
6 sick days ... (If I'm workin from home I'll work through bein sick since I can't get anyone else sick)
80% of 261 is 209 ... -3 - 12 -2 -6... Approx 186 days of commuting ... * 45 minutes each direction
16740 mins
279 total hours spent commuting to/from work each year
Wow, even though my commute is tolerable at 45 minutes ... and I work from home 1 day per week ... it certainly adds up!!!!!