Apparently this one can't!
Actually, I find it so very bizarre that your doctor would give you a date that is so close and expect you to lose such a massive amount of weight? Maybe your doctor has two personalities? One is rational and one is not!
First goal: under 180:
Second goal: 175 or below:
Third goal: 168 (no longer overweight):
Fourth goal: 160 or below:
Final goal: 145-155 (not sure if this will ever happen):