Another One for Math People

Okay... If I'm understanding the question right... You're wanting to be done pumping by the end of the year. You're wanting to know when to cut back to pumping 6 oz per day.

19jars * 16 oz = 304 oz.
2 1/2 more months until he's a year old is about 30+30+15 = 75 days
x = # of days pumping 12 oz
y = # of days pumping 6 oz

x + y = 75
304 - (15-12)x - (15-6)y = 304 - 3x - 9y = 0 oz left at the end.

It's a system, but you can solve for x in the first equation giving you x = 75 - y. (The number of days you pump 12 oz is the total number of days minus the number you pump 6 oz.)

Substitute into the other equation to get:
304 - 3(75-y) - 9y = 0
304 - 225 +3y - 9y = 0
79 + 3y - 9y = 0
79 -6y = 0
79 = 6y
y = 13 1/6 days
x = 75 - 13 = 62

so pump 12 oz for about 62 days, then 6 oz for about 13 days.

If my 75 days isn't 100% accurate, then just follow the same steps I did, but change the 75 to however many days you need it to be. Everything else will be the same. Feel free to PM me if you have any specific questions or just need me to work it out with a specific number of days for you.

I know you are younger than me but I swear you are my second grade math teacher because that question makes no sense. :(

J. cut the last answer in half, u'd have 101.33 days left if you pumped 12oz per day to get through those 19 bottles, you'd have 1/2 of that if you pumped 6oz so 50.6667 days left, I think, by that logig you'd deplete it before the end of the year only pumping 6oz
i think, my head hurts today
you need 72 days to get to 12/31, not counting today, so to get exactly 76 days you'd need to pump 8 oz per days which gives u 4 extra days to account for any issues

If you are exclusively pumping, then I would think that over time you are going to naturally produce less anyway. I guess I am just not sure why you feel the need to be so specific about the pumping and reducing the amounts.

If pumping the full 12 oz will get you to the end of the year, why not take stock a little closer to the end of the year (your goal) and see how things stand. Riley was correct that your production and babies' appetite will both be changing over this time period, and that is going to affect the math in ways that we can't compensate for very well. Because they are unknowns. And I really don't want to come off as mean or anything, but you really sound like you are over thinking this. Kids and parenting do not work on an exactly predictable schedule like that. You are going to need to learn to "go with the flow" a little bit or you will drive yourself nutso in a few short years.

Why not just pump whatever you can for as long as you can until say, the beginning of December (since you are looking to stop on New Years?) and then reassess where you are? It won't take but a week or so to basically dry up once you decide to do that. And you won't have a huge amount of stored milk at that point either, because you aren't adding to the stockpile along and along; you are still going to be depleting your stores.

Can you go back and post ALL of the info needed for the math problem? I need it all in one place. Then, I swear, I'm good at math! LOL =)