The following data are accumulated by Green Mountain Testing Services Inc. in evaluating two competing capital investment proposals:

 

Testing Equipment

Centrifuge

Amount of investment

$34,000

$40,000

Useful life

6 years

8 years

Estimated residual value

0

0

Estimated total income over the useful life

$10,200

$14,000

Determine the expected average rate of return for each proposal.