How much weight will you lose if you eat a diet of 500 calories twice a week?

In September of 2004 I started doing a buns video and lifting 5 lb weights 4 days a week. In 5 months I had lost only 7 lbs (I was 122) but I lost 5 sizes(from a size 8 to a size 3). Then I started doing cardio and lost another 5 lbs. and 3 sizes. If you were smart you would start off doing both. Lift weights Monday, Wednesday, and friday. Walk Tuesday, Thursday, and Saturday. Take a break on sunday. If I had done that I would have lost weight faster. Don't forget that muscle weighs more than fat, so between a good diet (Weight Watchers or the South Beach Diet) and weight training you could be lean and mean even though your body weight may be 10 lbs., or a little more (that's muscle only.)