I’m not sure about the concept you want me to confirm but if you mean “the capacity & cost that you that may be changed later on” due to never experienced on drying for Monsanto’s corn.
So, I think you can calculate the capacity and cost proposal base on your current drying experience and machine with adding some contingency value as we can’t wait exactly number from actual process.
Then we can discuss / negotiate before create the contract.
Please see my comment marked in yellow regarding your question for processing guideline.