Answer:
17.89%
Step-by-step explanation:
Calculation Determine the average rate of return on the equipment
Using this formula
Average rate of return =Avarage annual income /Average investment
Where,
Avarage annual income=Annual saving - Annual depreciation- Annual operating costs
Average investment= (Beginning costs + Residual value)÷2
Let plug in the formula
Average rate of return=$20,210 - ($85,000- $7,000)÷10 years-$4,130/($85,000+$7,000)÷2
Average rate of return=$20,210-($78,000÷10)-$4,180/($92,000)÷2
Average rate of return=$20,210-$7,800-$4,180/$46,000
Average rate of return=$8,230/$46,000
Average rate of return=0.1789*100
Average rate of return=17.89%
Therefore the average rate of return on the equipment will be 17.89%