Mr$.$ Mokhtar is considering opening a new foundry in Kajang, BB Bangi and Semenyih to produce high$-$quality product X$.$ He has assembled the following fixed cost and variable cost data: Location Fixed cost per year $($RM$)$Per unit costs $($RM$)$Material Labor Over head Kajang$\mathrm{ 2}00,000\mathrm{.}20\mathrm{.}40\mathrm{.}40$BB Bangi$\mathrm{ 1}80,000\mathrm{.}25\mathrm{.}75\mathrm{.}75$ Semenyih$\mathrm{ 1}70,0001\mathrm{.}001\mathrm{.}001\mathrm{.}00$

a$)$Graph the total costs line

b$\mathrm{) }$Over what range of annual volume is each facility going to have a competitive advantage?

c$)$What is the volume at the intersection of the BB Bangi and Semenyih cost lines?