Co. XYZ is having problems with personal phone calls during business hours (employees talking on the phone during business hours). Every minute of a personal call costs you $ 0.50 in lost wages. Co XYZ decides to hire operators to monitor the calls in a way that minimizes the total cost of personal calls.

# for operators	Total minutes of personal calls (per hour)
0	600
1	480
2	410
3	370
4	350

Show your calculations:

1. If operators get $ 25 per hour, how many operators does the co need to hire? X AND Z?

a. 1 operator

b. 2 operators

c. 3 operators

d. 4 operators

2. If operators receive $ 25 per hour, what is the minimum possible total cost of personal calls per hour?

a. $ 460

b. $ 255

c. $ 120

d. $ 85