Im having trouble figuring out how to split the earnings?

i have deals with several of my friends who haul junk.....i strip all the e waste (( anything with a board im interested in )))) for them....i get the boards for my labor ..and they get a nice clean pile of sorted junk..if there is a good bit of weight i pay them 10 cents per pound for the boards...if i get something thATs considerably valuable like a good hard drive or something ill kick them some extra cash after i sale it.....keep in mind this is what i do with friends and family....i usually have to make them take anything when i go to pay them,,,they are happy with just getting there stuff stripped for free..

i also do this for a couple businesses i pay them anywhere from 20 to 40 cents per pound for the boards i take , and they are all very happy with this