At those stats, your BMR works out to be 1382. It's 1660 with daily activity factor.
As Heather said, you factor about 3% of "weight to lose" per week for a good healthy rate. But you can allow about half a pound as a minimum rate. You have 7lbs to lose, so that's 0.21lbs a week, well under half, so go with half a pound a week as your maximum rate of loss. That means set your goal date for those 7 pounds as May 3.
One thing I often suggest with so little to lose is to set yourself up as maintaining your goal weight instead of weight loss. Tell the system how many calories you burn in exercise, but also set start and goal weights both as 125, and put your goal date as January 2014.
This will give you a "range" to maintain that weight. While getting down to it, rather than eating mid-range, simply eat at the lower end of that range on average. Eg if you get 1700-2050 then eat 1600-1800 most days.
Deb, in New Zealand