The following departmental information is for the four departments at Samoa Industries.

The Janitorial and Cafeteria departments are support departments. Samoa uses the sequential method to allocate support department costs, first allocating the costs from the Janitorial Department to the

Cafeteria, Cutting, and Assembly departments. Determine the proportional $($percentage$)$ usage of the Janitorial Department by the $($a$)$ Cafeteria, $($b$)$ Cutting, and $($c$)$ Assembly departments.

a$.$ Cafeteria Department

$\%$

b$.$ Cutting Department

$\%$

c$.$ Assembly Department

$\%$