Question Content AreaUsing the high$-$low method, calculate variable utilities costs per machine hour.

Month Cost Machine Hours

January $ $8,10013,900$

February $14,50020,500$

March $7,50010,500$

April $9,20018,900$

a$.$ $$0\mathrm{.}70$

b$.$ $$0\mathrm{.}50$

c$.$ $$0\mathrm{.}63$

d$.$ $$0\mathrm{.}25$