Listen, my husband weighs what you do and he's an inch shorter than you. At 42, his maintenance is about 2700.
Why don't you try shooting for that for now and see what happens? If in fact 2700 is your maintenance, and you lost five pounds of fat in 21 days, you created a deficit of about 800 calories a day, likely about 500 through diet and a further 200-300 through overtraining. My guess is that you were eating around 1800-2000 calories a day over this period.
1800 from food
500 calorie deficit from diet
300 calorie deficit from overtraining
________
2600 calories a day maintenance.
If I'm wrong, I can't even imagine what went wrong with your metabolism.
I can only assume that sounds right. In fact I would probably wager on it.
Ill try 2700 for now and see what happens. Thanks a lot Built......BTW newbie homework post was excellent, if only everyone were as patient!!!