liquid diet woes

when i was last weighed over a week ago i was 341.6 lbs sadly i have been bigger but i am determined to see this surgery through. i have a once in a life time chance to get healthy and actually live a normal life. They told me straight with all of my health issues if i don't go through with this i could actually die. I knew i was sick all the time but never to that degree so that was a rude awakening to say the least.
The liquid diet is monitored by a doctor so it is safe. (Just wanted to get that out there before the comments start coming in about dieting irresponsabily and things) . After surgery i will be on an all liquid diet for several weeks so they are preparing me now so i know what i am up against and that i have the will power to stick to this.
The object is to stay at or under 1200 calories a day and to increase my protein levels to that of 60-80 grams a day.
i am getting a better grip on where i ought to be. yesterday i was still over my calorie limit but i hit my protein levels amazingly.
breakfast - 1/2 cup cream of wheat cereal
3 cups skim milk
3 tbsp syprup (no added sugar)
note: i couldn't finish my breakfast
snack - bottle of water with strawberry/ orange/ banana crystal light
lunch - ensure strawberry with high protein
snack - 1 cup of milk with 2 scoops vanilla flavoured protein powder
supper - ensure again
snack - bottle water
crystal light
snack pack brand vanilla pudding cup

brought my total to:
1240 calories
12.2 fat
78.7 protein

I am suppose to weigh myself weekly but i think my scale is wrong it is telling me between 328-330lbs the R.N. that i email my updates to says it is entirely possible to have lost that amount in a week on a liquid diet but i am skeptical. so at this time i am not sure how much i have lost. i will update you as soon as i know :)