Assume you are considering two mutually exclusive machines and need to select one for a cost$-$cutting project. Which one of these sets of characteristics best indicates the use of the equivalent annual cost method of analysis?

$$ Differing manufacturers and differing operating costs

$$ Differing lives with no replacement at end of life

$$ Differing costs with no replacement at end of life

$$ Differing lives and planned replacement at end of life

$$ Differing required returns with no replacement at end of life