chen company uses activity-based costing. it budgets $1,160,000 of overhead cost to sustainably dispose of 2,900 tons of hazardous waste. a. compute the activity rate for hazardous waste disposal based on tons of hazardous waste. b. the company disposed of 5 tons of hazardous waste in completing job 125. allocate overhead cost to hazardous waste disposal as part of job 125 using activity-based costing.