xChing$-$Chang Kuo is considering opening a new foundry in Edwardsville or Fayettevile, Arkansas, to produce high$-$quality rifle sight. He has assembled the following fixed$-$cost and variable$-$cost data: $(2$ points$)$

Per$-$Unit Cost

Location

Fixed Cost Per Year $($$$)$

Material$($$$)$

Labor$($$$)$

Overhead$($$$)$

Edwardsville

$30,000$

$\mathrm{.}25$

$\mathrm{.}75$

$\mathrm{.}75$

Fayetteville

$20,000$

$1$

$1$

$1$

a$.$ What is the volume at the intersection of the Edwardsville and Fayetteville cost lines?

b$.$ Over what range of annual volume is each facility going to have a competitive advantage?