Baby Food/CGD how long does it last?

[GreenNeutron]

How long does 1 jar of babyfood last for a group of 3 breeding cresties? I can't seem to find the _amount_ of it to feed at once on any care sheet, just how often to offer it (most suggesting either daily or every other day) is this about right? How much should one crestie eat in one sitting?
I just ask because babyfood is surprisingly expensive! Also how long would one of the small bottles that makes about .5lbs cgd last for 3 breeding adults, and how much of that should be fed at one sitting. For this I've seen frequency data from every 3-4 days to every 5-6 days, which is accurate, or is it a matter of some debate?

Thanks :-)

~Melissa