Agree the development stage and quality your buyer will accept, then organise picking, clean containers and dispatch around that specification. Use a species-specific post-harvest plan; storage conditions suitable for another mushroom must not be assumed suitable here. Ask your trainer or post-harvest specialist for the handling and storage protocol for your product and route.
Reconcile harvested, dispatched, accepted, rejected and paid quantities. Older extension publications include illustrative prices and earnings; those figures describe their historical examples, not your present market. Test a real buyer route and record actual preparation costs, labour, losses and payment delays before treating the enterprise as repeatable.