what would have been the total cost of this whole conversion effort COBOL to JAVA system? even if it $100 millions, it seems a successful project , given DoD

what would have been the total cost of this whole conversion effort COBOL to JAVA system? even if it $100 millions, it seems a successful project , given DoD mentioned potential savings of $25 millions/year >Customer Benefits > For the DoD, the component has been transformed from an expensive mainframe COBOL legacy system to an affordable, modern maintainable Java-based system. All valuable existing business rules have been preserved in the modernized system, while development, test, and production environments were migrated to AWS providing flexibility at reduced cost. >The DoD’s projected cost savings is $25 million per year, and they are now able to use popular Java programmers to maintain and enhance the critical component.