Will this work or not good enough?

I weigh around 125lbs and am like 5 1' 1/2. If I eat oatmeal (140 calories), carrots and celery (idk how many calories), 2 apples (160 calories), dinner (around 300 calories), and 2 atkins snacks (260 calories). I exercise half an hour everyday (burning 540 calories). How long do you think it will take me to lose 30lbs?