It would not be 50% of the manufacturing cost as EDig would be fronting monies it said it would not do. They would still be on the hook for 50% of the cost of manufacturing WAITING for payment. At that rate EDig would go broke immediately upon receiving a large order.
It would not be 50% of the cost of the DP Wencor sells to the airline.
So it would have to be 50% of what EDig`s final price to Wencor. That covers all the costs of manufacturing, allowing EDig the ability to pay cash to its manufacturer, which it has to do since it is on a cash basis with its manufacturer, plus, perhaps, allow a small cash cushion until Wencor pays in full.....
Besides that RP alluded to me that was what it was...