Answer:Dept. Y and Dept. Z, respectively, are: $8,300 and $6,700
Explanation:
Given that
total delivery expense of  Y and Z=$15,000
and Y and Z both have  50% of regular delivery requests
Departments    Direct expenses    Indirect expenses
y                $1,600          $13,400 x 50% = $6,700
z                   $0          $13,400 x 50 % = $6,700
For department y = The total expenses = Â direct expenses+indirect expenses $1,600 + $6,700 = $8,300
For department Z= The total expenses = Â direct expenses+indirect expenses $0 + $6,700 = $6,700