Here give ya a working example myself..
A decade ago driving truck DeLongs Grain Elevators..
Delong Company is a International Player in Global Grain Markets..
In Midwest the Farmer sells his Harvest to Delong he can take flat "Ca$h upfront that days prices print him a check & paid on the spot right there..
Theres also "Futures" & Levereging some "Producers" took half in Ca$H bought "Futures" the Rest ..
We also made "Storage & Drying" Fees..
A bigger operation usually had its own Grain Bins and storage.
Smaller Guys did not have bins and as soon as harvest $old 2 Elevarors the going price that day