Convert ounce too drop in UOM

[fcarll]

You might want to look at this thread.

Consuming partial raw goods

That is what I had attempted to do. I can not figure out how to “purchase” by the square inch. It feels like a simple thing that I am missing

Two different ways to accomplish what you seem to want. In your case you would need to determine how many drops are needed to make a fluid ounce.

Hope this helps.

Frank