Hi,

You can definately breastfeed your baby. It's certainly not to late. I was wondering (only if you wanted to share) what happened to make you stop breastfeeding?
As manta said, most breastfed babies feed 8-12 times in 24hrs. You will need to gradually cut back the amount of formula you give her as your supply improves. The best way to tell how much your baby is having is to watch her wet and dirty nappies - if it's coming out, it must have gone in. So you are looking for 5 or so heavy wet disposables and at least one big poo per day. Over time, you will also see that her weightgain continues.
It is important that you get information and support. As others suggest, get a lactation consultant - I can recommend one. And get in touch with your local ABA group (once again I can give you a contact. You can put your baby to the breast - straight away - as many times as you want, but in the early days, give her a bottle after she feeds. See if she takes less. As you get better, cut it down by say, 30 mls per time. Remember, she will want to feed more often.
ABA has a fabulous booklet - Adoptive breastfeeding and relactation. Only $5 - get a copy. Information is the most powerful and important thing in this sort of situation
Regards
Barb