QUESTION 6 10 points Save Answer A contractor plans to buy a backhoe machine for a construction project. The total useful hour of the machine is estimated to be 6 years with 9,000 hours use. He estimates the total annual Ownership and Operating cost will be $72,450. Answer the following questions: Hourly ownership and operating costs are [a]. QUESTION 7 10 points Save Answer A contractor plans to buy a backhoe machine for a construction project. The total useful hour of the machine is estimated to be 6 years with 9,000 hours use. He estimates the hourly cost is $57.60 If the production rate of the backhoe is estimated to be 30 cu. yd. / hour, the cost is b 1. QUESTION 8 10 points Save Answer A contractor plans to buy a backhoe machine for a construction project. The total useful hour of the machine is estimated to be 6 years with 9,000 hours use. He estimates the unit cost $2.82/cy. If the backhoe has to excavate a 2,000 cu.yd. of soil, the total cost for this operation is