The following information is available for a company's maintenance cost over the last seven months. Using the high$-$low method, estimate both the fixed cost per month and variable cost per unit for maintenance cost.

$\backslash$table$[[$Month$,$Maintenance Hours,Maintenance Cost$],[$June$,18,5,450],[$July$,36,6,900],[$August$,24,5,100],[$September$,30,6,000],[$October$,42,6,900],[$November$,48,8,100],[$December$,12,3,600]]$

Variable cost per unit$1258900-\frac{3600}{48}-12$ Fixed cost$-$