Inter-org Transfer from OPM Org to non-OPM Org?

Dears

I am facing problem in the following:

i need to transfer items from OPM org to non-OPM Org but in the setup there is mandatory fields regrading transfer price (interorg profit account)

now i need to update price list manually every time this is very hard and there is difference always

How to solve this

there is no transfer price and the cost should be calculated in the average cost it self

Best Regards