Hi judi
Sorry to hear that you will not be continuing with CD, good luck with carrying on with losing weight. I would have thought that the lower loss this week could be related to the massive loss in week 1, followed by achieving a very respectable loss in week 2. Remember, this is a diet that we can lose one pound in a week and considerably more the next - for some people there isn't a predictable and logical weekly pattern but it all comes off in the end.
I am sure that you have carefully looked at your individual/family finances before making a decision about the viability of continuing CD but I do know without any doubt that I spend more on food when I don't do CD - with lots of additional costs beyond the supermarket bill (bars of chocs, spontaneous snacks from the bakery, take-aways)
However, I do understand that we all have different routines and this kind of food spending could be quite specific to me.
Wishing you well with calorie counting, lots of luck x