Comparable transactional costs.
(iii) Comparable transactional costs. Comparable transactional costs consist of the costs of providing the services under review that are taken into account as the basis for determining the gross services profit markup in comparable uncontrolled transactions. Depending on the facts and circumstances, such costs typically include all compensation attributable to employees directly involved in the performance of such services, materials and supplies consumed or made available in rendering such services, and may include as well other costs of rendering the services. Comparable transactional costs must be determined on a basis that will facilitate comparison with the comparable uncontrolled transactions. For that reason, comparable transactional costs may not necessarily equal total services costs, as defined in paragraph (j) of this section, and in appropriate cases may be a subset of total services costs. Generally accepted accounting principles or Federal income tax accounting rules (where Federal income tax data for comparable transactions or business activities are available) may provide useful guidance but will not conclusively establish the appropriate comparable transactional costs for purposes of this method.