This is the cut the barn keeps for selling the consignor's animals. It's charged against the gross sale amount and deducted on the consignor's settlement. Enter it as a percent — for example, 1.5%.
You can also set a per-head floor and ceiling so commission is never too small or too large on a given lot. See the minimum and maximum per-head fields.
Technical section
Data model, API, and internals — visible to developers.