Answer:
average rate of return = 13 %
Step-by-step explanation:
given data
equipment cost = $125,000
residual value = $15,000
time = 8 year
Annual Average wage = $28000
Annual operating and energy costs = $5,150
to find out
average rate of return
solution
first we get here depreciation expenses that is here as
Depreciation expense = ( equipment cost - residual value ) รท time period .........1
Depreciation expense =

Depreciation expense = $13750
so average annual income will be here as
average annual income = Annual Average wage - Depreciation expense - Annual operating and energy costs ....................2
average annual income = $28,000 - $13750 -$5150
average annual income = $9100
and average investment will be
average investment =

average investment = $70000
so average rate of return will be here as
average rate of return =
..............3
average rate of return =
average rate of return = 0.13
average rate of return = 13 %