My company submitted a proposal for an effort which included facilities capital cost of money. The resulting contract contains neither 52.215-17 or 52.215-16. We meet all of the criteria under 31.205-10(b and our COM calculations are compliant to the limitations in 31.205-52. However, our customer is now telling us that COM is not an allowable cost. Under what circumstances would this be the case? I'm assuming that the omission of 52.215-16 is of no bearing as it is a required clause for cost reimbursable supply contracts when applicable.