29. What is the difference between a direct cost and an indirect cost? a. They are the same thing. b. Direct costs are costs that are billed to the nonoperators on a dollar-per-dollar basis, while indirect costs are repaid to the operator via an overhead charge. c. Indirect costs are costs that can be shared with the nonoperators on a dollar-per-dollar basis, while direct costs are repaid to the operator via an overhead charge. d. Direct costs are costs that are billed to the nonoperators on a dollar-per- dollar basis, while indirect costs are borne entirely by the operator. e. None of these applies