Solve correctly otherwise please skip it

What would be the cost per acre to run the tractor from #5 and the disk from #6 together? #5 What is the average annual total cost per hour for a $225,000; 300 Hp tractor for 5 years if is is used 800 hours per year? (assume diesel fuel at $2.50 per gallon, Per $1000= 220) #6 What is the average cost per hour for a $100,000 disk after 5 years with 200 hours per year of use? This disk has a capacity of 20 acres per hour. $9.46 $7.63 $8.54 $11.25