Question Content AreaBased on the following information, calculate fixed costs per month using the high$-$low method.

Month Cost Machine Hours

April $$55,00022,000$

May $75,00032,000$

June $60,00028,000$

July $62,00022,000$

a$.$ $$9,000$

b$.$ $$12,000$

c$.$ $$11,000$

d$.$ $$10,000$