You cannot loose more than 12% of your weight in any round. That would be over 17lbs for you. I would not eat less than 1000 calories a day. While you may feel fine on day one, the hunger will come which may cause you to binge. Once you start exercising it will be worse. You need to fuel your body. The only warning with prepackage meals is your sodium intake. Just be mindful of that. Maybe put another snack of Apple and string cheese, nuts, or something else healthy and fresh into the mix. It will help curve potential cravings and help you hit the calorie goal.
Steph-Jane and PDXJael like this comment.