The controller of Sheridan Production has collected the following monthly cost data for analyzing the behavior of electricity costs.

$\backslash$table$[[,\backslash$table$[[$Total$],[$Electricity Costs$]],\backslash$table$[[$Total$],[$Machine Hours$]]],[$January$,$$$2,380,200],[$February$,3,010,390],[$March$,3,600,490],[$April$,4,800,690],[$May$,3,150,500],[$June$,4,900,710],[$July$,4,040,645],[$August$,3,880,530],[$September$,5,060,675],[$October$,4,200,610],[$November$,3,390,390],[$December$,7,680,730]]$

$($a$)$

$$ Your answer is correct.

Determine the fixed costs and unit variable costs using the high$-$low method.

Total fixed costs

Variable cost per machine hour