According to the information provided in Table $12-1,$ what is the hourly total cost of the system for customers and servers? Assume that servers are paid only when they are helping customers. A$)$ $$117\mathrm{.}67$ B$)$ $$121\mathrm{.}47$ C$)$ $$129\mathrm{.}09$ D$)$ $$125\mathrm{.}76$