Tri-State Mill uses a special sander to finish lumber. Data on the sander and its usage follow: Cost Driver Rate. Cost Driver Volume Resources used Energy $ 0.7 per machine-hour Repairs $ 12 per job 4,000 machine-hours 950 jobs Resources supplied Energy Repairs $ 7,900 13,000 Required: Compute unused resource capacity in energy and repairs for Tri-State Mill. Unused Resource nces Energy Repairs Capacity