The Manager of the Customer Service Department at a Bank

The manager of the customer service department at a bank can hire employees with a high school degree (HS) who earn $10,000 annually or employees with a bachelor's degree (B) who earn $20,000. The manager wants to maximize the number of customers served given a fixed payroll.

$\begin{array}{lll}& \text {Number of Adaitional Customers Served }\\ \text { Worker}& \text {High School Degree }& \text {Bachelor's Degree }\\1 s t & 80 & 90 \\2nd & 60 & 80 \\3 r d & 50 & 60 \\4 t h & 40 & 40 \\5 t h & 35 & 35 \\6 \text { th } & 30 & 25\end{array}$
-If the manager's payroll is $120,000, what should be done to maximize the number of customers served?

A) Hire six HS and three B.
B) Hire five HS and five B.
C) Hire four HS and four B.
D) Hire two HS and five B.