BMR, TDEE, net cals issue... Again! :)

HI Everyone! My goal is to gain muscle and lose a couple pounds of fat.
I am 5'2'' and I exercise 5-6 days a week and usually burn around 500 calories. I also use the Fitbit to adjust if I burn more than 1350 in a day.

I have a question about the whole BMR, TDEE, net cals issue.
With a BMR of 1080 and a TDEE of 1350, I set my net goal at 900 calories a day (but I always eat more than that because I eat back my exercise calories)... here's my thinking...

1350 (which is my TDEE) X 7 days = 9450 (TDEE for the week) minus 3500 (to lose a pound a week) = 6090 divided by 7 days = 850 calories.

So each morning my net is set at 900 and I usually consume 1300 to 1500 calories a day. ***That way the "calories remaining" is always accurate*** and that makes sense to me.

Keeping net at 900 to me seems easier. Make sense or no?