WMEJ is an independent television station run by a major state university.

WMEJ is an independent television station run by a major state university.  The station's broadcast hours vary during the year depending on whether the university is in session.  The station's production-crew and supervisory costs are as follows for July and September.
        Cost       Cost          Boradcast Hours
Cost Item         Behavior    Amount       during month
Production crew       variable
     July       $4,875 390
     September        8,000 640
Supervisory employees  fixed
     July        5,000 390
     September        5,000 640

1. Compute the cost per broadcast hour during July and September for each of these cost items.

2. What will be the total amount incurred for each of these costs during December, when the station's activity will be 420 broadcast hours?

2. What will be the cost per broadcast hour in December for each of the cost items?