Which of the following statements is most correct with respect to chargeout rates? OA. A chargeout rate is typically set to cover all costs and required profit margin, but may be varied in the short term to match competitors' actions. A chargeout rate is typically set to cover costs of materials, labour and overhead only OB OC. If the firm does not base its chargeout rate on costs, it will not survive. OD. A chargeout rate is always set to cover the cost of labour and overheads and the required profit margin