Answer:
155%
Explanation:
The computation of Average rate of return is shown below:-
Annual operating income = Sales - Manufacturing cost
= (4,000 Ă— $450) - (4,000 Â Ă— $264)
= $744,000
Average investment = (Initial cost + Residual value) Ă· 2
= ($940,000 + $20,000) Ă· 2
= $480,000
Average rate of return = Average annual operating income Ă· Average investment
= $744,000 Ă· $480,000
= 155%