Memphis has been selected as the city of choice for the next Operations Management Professional Conference due to its high overall factor rating of $65,$ according to the factor rating$-$weight table below.

Factor Rating $(1-100)$ Weight

Energy availability $600\mathrm{.}3$

Labor availability $800\mathrm{.}2$

Transportation $400\mathrm{.}2$

Supplies $"$X$"0\mathrm{.}1$

Taxes and regulations $700\mathrm{.}1$

Infrastructure $700\mathrm{.}1$

The rating $(1-100)$ for the "Supplies" factor $"$X$"$ must have been $\_\_\_\_.($Hint: use algebra to solve for X$).$

A$.$

$60$

B$.$

$75$

C$.$

$90$

D$.$

$80$