What matters most is what YOU do with your DS! I am just saying it's NOT an exact science.
Try not to fall into the trap of OMG I am losing too much! I can't even tell you how many people do this when they get close to goal. Actually your real target should be about 10% under goal because almost everyone has some bounceback. Anyway people drive themselves crazy over this and start eating. They stop losing. Then the bounceback happens. And here they are 2 years later still trying to lose the last 40lbs.
So my target should be like around 140 with hopes of bouncing back to 160?