A pharmacy currently works a two-line configuration to fill prescriptions and provide vaccinations. Each line has a dedicated cashier that collects payment and forwards the request to the team of pharmacists, who then call the customers. Every 10 minutes, on average, a customer arrives at the vaccination line. The cashier takes an average of 5 minutes to serve a customer, and there is, on average, 1 customer waiting in line. A customer looking for a prescription spends 12 minutes waiting and paying in the cashiers' area, which has 3 customers, on average, waiting and being served by the cashier. It takes the cashier in the prescription line 3 minutes to check out a customer.

As part of a marketing campaign, a local gym will be distributing pamphlets promoting the benefits of their memberships for 2 hours in the cashiers' area (for both prescription and vaccination customers). How many pamphlets should the gym representatives have at hand?

Answer Choices

A. 15 pamphlets.

B. 22 pamphlets.

C. 42 pamphlets.

D 10 pamphlets.