That's great! I was going to second what the other's said and then also say you can't equate the amount of formula a baby eats to the amount of momma's milk they need- but now you already know that..LOL!! sounds like it was really helpful.
I do want to stress the importance of eating enough. I was not worried about weight loss at first, was eating plenty (to ensure my milk came in) and had tons of milk. After a few weeks I decided I needed to start focusing on weight loss and cut my calories some. I saw a dramatic decrease in the amount of milk I made. When I started eating more, it came back. You don't need to eat a ton of extra calories, but you need to be eating a few more than you might if not bfing. Don't try to make the weight come off too quick...it will come off over time if you are bfing.
I do want to stress the importance of eating enough. I was not worried about weight loss at first, was eating plenty (to ensure my milk came in) and had tons of milk. After a few weeks I decided I needed to start focusing on weight loss and cut my calories some. I saw a dramatic decrease in the amount of milk I made. When I started eating more, it came back. You don't need to eat a ton of extra calories, but you need to be eating a few more than you might if not bfing. Don't try to make the weight come off too quick...it will come off over time if you are bfing.