This download is a pdf hyperdoc that has links to various cited sources for information on  labeling soap.  These sources are either government websites or from the Handcrafted Soap and Cosmetic Guild. 

Note: In the US, children's soap requires lead testing.  This information is cited in the hyperdoc from a government website.

Here is a batch cost calculator available in both Google Sheets and Excel.
If you click the button to use the Google Sheets version, it will ask you to make a copy.  The Excel version will download to your device when you click it.
Please leave a comment if something doesn't work correctly or if you love it.  Happy soaping!