In applying the high$-$low method, what is the fixed cost?

Month

January

Febru

March

April

$\backslash$table$[[$Miles$,$Total Cost,$],[80,000,$$$192,000,],[50,000,160,000,],[70,000,188,000,],[90,000,260,000,]]$

a$.$ $$100,000$

b$.$ $$72,000$

c$.$ $$35,000$

d$.$ $$28,000$