System A: A single$-$server operation in which one employee fills the order and takes the money from the customer. The average service time for this alternative is $1\mathrm{.}5$ minutes.

System B: A single$-$server operation in which one employee fills the order while a second employee takes the money from the customer. The average service time for this alternative is $1\mathrm{.}2$ minutes. minutes for each server.

The following cost information is available.

Customer waiting time is valued at $$30$ per hour to reflect the fact that waiting time is costly to the fast$-$food business.

The cost of each employee is $$5\mathrm{.}5$ per hour.

To account for equipment and space, an additional cost of $$20$ per hour is attributable to each server.

What is the lowest$-$cost design for the fast$-$food business? Round your answers to the nearest cent.

Note: Use Po values from Table $11\mathrm{.}4$ to answer the questions below.

$\backslash$table$[[,$Total Cost$/$hour$],[$System A$,$$