Speedy Delivery, a New Mail Service Firm, Rents Docking and Unloading

Multiple Choice

Speedy Delivery, a new mail service firm, rents docking and unloading bays from its friendly competitor at a cost of $\$ 200$ per hour, which includes the cost of unloading the crew. Each bay can unload at a rate of 2 trucks per hour. Trucks arrive at its facility at the rate of 4 per hour, and the trucking company charges $\$ 300$ per hour of time spent by the truck in the system. The arrivals are Poisson, and service is exponential. At present the firm rents 3 bays. From appropriate table, $\mathrm{L}_{\mathrm{q}}$ was found to be 0.45 . The total hourly cost of bay and truck unloading and waiting cost will be

A) $\$ 735$
B) $\$ 1,035$
C) $\$ 600$
D) $\$ 435$