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 $ 0.90 per machine-hour 6,000 machine-hours Repairs $ 16.00 per job 600 jobs Resources supplied Energy $ 6,900 Repairs 12,000 Required: Compute unused resource capacity in energy and repairs for Tri-State Mill.