700 Calories

Today I was noticeably more exhausted than yesterday.  Perhaps because I took the day off on Tuesday.  But it was really hell to do as many minutes as I did yesterday.  I wasn't able to maintain the same pace I did yesterday. 
Nothing particularly exciting caught my attention today... except for one girl who was totally skinny and one that could have totally passed for a man.  The skinny lady was spinning and hunched over on the handlebars.  She was sweating buckets (not like yesterday's spinning champion) and her spine was sticking up and I could clearly make out about four or five of her vertebrae.  Not sure if that's normal... but it was kind of gross.  The other lady was probably early 20's and would have passed for a man if it weren't for the outline of her sports bra underneath her work-out attire. 
I'm starting to recognize a few of the repeat fitness junkies.  Maybe in time I'll even talk to one or two.  Seems like talking amongst gym patrons is not culturally acceptable, although I think it's different in the classes held upstairs from the cardio equipment and weights area.
So today I've learned that it takes aprox 3,500 calories to burn a pound of fat.  So, that breaks down to or an average of 500 calories to burn per day beyond what I need to account for what I'm eating.
I've been doing more like 700 in my hour and a half work-outs... so I think that's good.  I should be able to effectively kill 1 lb/week assuming I don't go heinously overboard with my eating habits.
Honestly, to meet my goal of 80lbs in 2 years, I can lost 3/4 of a pound each week and still be good.
That's about 3/month.
Do-able.
I can do this.