Which one of the following sttements is correct (true)? Multiple Choice when activity-besed costing is used for internal decision-making, the costs of idle cepacity should be assigned to products Direct labor costs ore usually included in the costs that are allocated to activity cost pools in an activity-based costing systen Direct materials costs are usually included in the costs thet are allocated to activity cost pools in an activity-based costing system In the first-stage allocation in an ABC system, some costs may be allocated to a special cost pool that are not subsequently allocated to products or customers