The equation that is used to determine the Expected Uniform Annual Cost is :
[tex]$A = P(A/P, i,n) - F(A/F, i,n)$[/tex]
It is given that :
Purchased price of a new trailer = $ 10,000
Number of years = 13 years
The salvage value after 13 years = $480
The rate of interest annually = 4.20%
The Estimated Uniform Annual Cost, that is the EUAC method is used to express the life cycle costs as the annualized estimate of the cash flow rather than a lumpsum estimate of the present value.
In other words, it is the annual cost of a system which is equal or equivalent to the discounted total cost.
So the equation that can be used to express the Expected Uniform Annual Cost in the given problem is :
[tex]$A = P(A/P, i,n) - F(A/F, i,n)$[/tex]
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