Is my diet okay for me to lose 7lbs in 1 month?

Rice crispies are not very healthy, I would choose a whole grain cereal like weetabix or even cheerios are better than rice crispies. Pasta isn't great for you either, try a salad for lunch instead. Dinner sounds ok, make sure it's brown rice though not white rice. Snacks are fine, would be better to have an apple/fruit instead of the snack a jacks. Exercise sounds good!