Diaper stockpile!

So I'm posting this question again because last time I just got a lot of responses saying I shouldnt stockpile. I appreciate all the input I got, however, for our situation this is the best option for us. Im not personally stockpiling any diapers. Our best friend works in a hospital and is able to order diapers in bulk for the hospital's price (nb size is a box of 240 for about $6, which comes to about 2 cents a diaper) they get a little more expensive as you size up but never more than 7 cents a diaper. Thats a pretty hard price to beat and she's offered to buy diapers for us and I want to know a good estimate of how many per size to expect. I dont want to overdo it and have her get way too many or too little. I found a couple charts that break down how many per size to load up on and I just wanna know which one you think is more accurate. I know every baby is different and you never know how many you'll actually use, I just wanna get a better idea, because I have no clue.......

Also, like most hospitals, this one uses pampers. So thats what we plan on using. We understand that our baby may have allergies or that pampers just may not work for us, and if thats the case, we'll handle it when it happens. But for the time being we feel that this is the best option for us. Sorry for the long post, just wanted to address everything. Thanks for any input:)