Answer
$\text{Rating }\approx
101.2
$
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 $A=
475
,$ $C=
312
,$ $T=
28
,$ $Y=
3922
,$ and $I=
11
,$ then
\begin{array}{l}\require{cancel}
\text{Rating = }
\dfrac{\left(250\cdot\dfrac{
312
}{
475
} \right)+\left(1000\cdot\dfrac{
28
}{
475
} \right)+\left(12.5\cdot\dfrac{
3922
}{
475
} \right)+6.25-\left(1250\cdot\dfrac{
11
}{
475
} \right)}{3}
\\\\
\text{Rating = }
101.2237
\\\\
\text{Rating }\approx
101.2
.\end{array}
