A location analysis has been narrowed down to three locations. The critical factors, their weights, and the ratings for each location are shown below:

$\backslash$table$[[,$Location,$],[$Factor$,$W$.,$A$,$B$,$C$],[$Labor Cost,$4,70,70,90],[$Transportation Cost,$\mathrm{.}2,80,80,60],[$Market Access,$\mathrm{.}2,90,70,60],[$Raw Materials Cost,$\mathrm{.}1,50,70,90],[$Utility Cost,$\mathrm{.}1,80,90,70]]$

What is the composite score for location $B?$

Multiple Choice

$75$

$78$

$76$