Using the reciprocal services method, which of the following equations represents the aigebraic expression for the total costs of a Janitorial Department (J) that indudes not only $350,000 of direct cocts but also 30% of the Maintenance Departments (M) cost? a. J=$3,50,000+(0,30M) b. 3=5350.000+(0.30+M) c. 1=($350,0000.30)+M d. t=3350,000(0.30M)