You are a new Project Manager that has been entrusted with a software development project that is in progress. A sub-contracting company has been awarded a cost reimbursable contract to do the development work on this project, and the project has been completed. While trying to close this procurement, you discover that still there are some unresolved claims. However, the sub contract company does not accept that these claims are unresolved. Which of the following is the best method for reaching the final equitable settlement?