eating disorder recovery question

sr106 said: "I work out 5 days a week, min. hour and a half. i either do an hour's cardio class (interval training) + 20 min stepper machine + 30 min run/walk OR I'll do 2-3 miles running/walking + 30 minutes rowing machine + 30 minutes stepper. each of those days i also do about 10 min of abs/lunges/free weights. I am recovering from anorexia and am terrified of gaining weight, thus the exercise. On the other hand, it feels like I can't tone up no matter what I do, so I still hate how my body looks. I am currently 21 years old, 5'4" 105-110 (not sure exactly). I haven't had a period since October. I eat between 800 and 1200 calories a day, averaging a 1000. How much more should I eat / reduce exercise? Thanks for any help!"