I Should have written this earlier in this thread but had forgotten.
The early (2004) MBDC business plan.
1. All members must contribute some sort of labour, and collection of WVO is considered such.
2. WVO brought to the club reactor is valued at 20c per litre in credit.
3. The consumables were costed with a positive return at 50c per litre. (Positive return = budget surplus)
4. Members could take away Biodiesel for a 70c debit to their credit account and no more than the value of their credit balance.
5. All members had to take away with them some , any amount, Glycerine and dispose of it an environmentally concerned fashion, I.e sweetening their home compost or garden mulch, making soap or degreaser, etc etc.
6. Members who contributed in labour working on the plant but brought no WVO could create a credit balance with cash to buy consumables, (meth, KoH etc) or reciepts from plant machinery parts (pipes, taps, plumbing, motors, pumps etc)
This business plan worked fantastic for about a year untill the mathematics caught up with us and we had a deficit that equated to bad yields. We then decided to change the plan according to a general yield rate of 80 % of the oil WVO. Net not gross batch volumes (another surplus mechanism).
All this was documented in a simple old fashioned columns book from the Stationery shop.This worked perfectly. So perfectly that the books (after another 9 months) showed we had a thief in the ranks. This brought about the closure of that particular plant, and alot of disillusion within what had been a beautiful thing.

TIP Anyone wishing to emulate this business plan just be aware that the "Book" should be stashed in a place where it wont be found by a surprise visit by the ATO. Not that I think the ATO has such an inspector, but Tax/excise paranoia is a real thing that we encountered.
My previous thread yield quotes were of gross volume of batch reaction volume. i.e oil + meth.