1) Each year, 4 million babies are born in the U.S.
2) Newborns require about 10 diaper changes a day
3) By age 1, hardly any babies are potty-trained
4) By age 2, most all are potty-trained
Please compile an Excel spreadsheet calculating the annual U.S. demand for paper diapers.
You may research the topic, however, it is important to state your assumptions and support them with reliable research. Please reference your sources appropriately.