Calories to maintain post-op... Figured out maybe?

In a previous thread, I was bemoaning the fact (ok, whining a bit) about the fact that my nutritionist wouldn't give me a straight answer as far as how many calories (et cetera) I was supposed to be sticking to post-surgery in order to lose weight...

Being the data geek that I am however, I might have been able to figure it out myself but wanted some confirmation of my thoughts.

Over the past several weeks, I've been "stair stepping" my weight loss. Between 7-10 days to lose a pound or so. Fat is burned off at a typical rate of 3500 calories per pound, right?

Looking over my MFP log, I seem to be consuming between 800 to 1200 calories per day, so given the idea of sitting on a 10-day plateau, running an assumed 350 calorie deficit, can I presume that my post-op "maintain weight" calorie count is somewhere between 1200 and 1300 calories?

I know Protein and exercise are more important. I'm now getting my protein (between 70 to 110 grams per day) but I still have physical limitations (and mental ones too) that keep me from exercising as I should.

Thoughts?

Wayne