The above is from instructions that came with MTP wax. Looks like seldom used about 1/2 as much.
Any organic material really soaks up wax.

Dirt, because of the organics JBS eluded to is why I charged 50% more for it over the waxed sand, Even the amount of wax I used in my sand was at times more than needed. I learned to cool my waxed sand & dirt in a HF cement mixer with a couple of softball-size rocks in the mixer to keep the waxed material from sticking so badly to the walls rather than the earlier raking method and I would get “pebbles” of mostly wax once it was cooled. I always screened every batch so I just recycled the pebbles in the next batch.

I never weighted any wax, I just learned by looks of the melted material and by feel how much I needed to use with each batch because it was always pretty much the same amount of sand or dirt. I also tested every batch as you see how I did that in my photos and I would also grab a handful of each batch after screening and give it a squeeze to see if it clumped and felt the way I wanted. I did this before the water tests btw.

Thanks JBS and Seldom