Mason Company has two manufacturing departments$-$Machining and Assembly. The company considers all of its manufacturing overhead costs to be fixed costs. It provided the following estimates at the beginning of the year as well as the following information with respect to Jobs A and $B$ :

$\backslash$table$[[$Estimated Data,,,Machining,Assembly,Total$],[$Manufacturing overhead,,,$4,212,000,$$$324,000,$$$4,536,000$