Answer
$\text{Rating }\approx
92.0
$
Work Step by Step
Using the given formula, $
\text{Rating = }\dfrac{\left(250\cdot\dfrac{C}{A} \right)+\left(1000\cdot\dfrac{T}{A} \right)+\left(12.5\cdot\dfrac{Y}{A} \right)+6.25-\left(1250\cdot\dfrac{I}{A} \right)}{3}
,$ where $A=
679
,$ $C=
450
,$ $T=
33
,$ $Y=
4700
,$ and $I=
17
,$ then
\begin{array}{l}\require{cancel}
\text{Rating = }
\dfrac{\left(250\cdot\dfrac{
450
}{
679
} \right)+\left(1000\cdot\dfrac{
33
}{
679
} \right)+\left(12.5\cdot\dfrac{
4700
}{
679
} \right)+6.25-\left(1250\cdot\dfrac{
17
}{
679
} \right)}{3}
\\\\
\text{Rating = }
91.92133
\\\\
\text{Rating }\approx
92.0
.\end{array}