An assembly line consisting of 3 consecutive stations produces 2 radio models: HiFi-1 & HiFi-2. The following table provides the assembly times for the 3 work stations.

Work Station 1 Minutes Per Unit:

Hifi-1= 6

HiFi-2 = 4

Work Station 2 Minutes Per Unit:

Hifi-1= 5

HiFi-2 = 5

Work Station 3 Minutes Per Unit:

Hifi-1= 4

HiFi-2 = 6

The daily maintenance for stations 1,2 & 3 consumes 10%,14% & 12% respectively, of the maximum 480 minutes available for each station each day.

Must Determine the optimal product mix that will minimize the idle (or unused) times in the 3 work stations.