Master Karr is a supplier of industrial parts. All orders are received at a call center. The call center has 15 phone lines, so that a maximum of 15 callers may be in the system at a time. Calls arrive at an average of 4 call per minute. The call center currently has 5 customer service representatives (CSR). Each CSR averages 1 minute a customer. Master Karr estimates that waiting costs incurred are $1 per customer per minute in terms of phone charges and loss of future business. Also assume that callers who get a busy signal take their business elsewhere, resulting in a loss to Master Karr of once they enter the system. CSRs are paid $15 per hour. a. What is the current hourly cost? b. What is the hourly cost to Master Karr if they decide to hire another CSR?
Please provide step by step. Don't just tell me that Waiting cost is $60Ii. Tell me how to get Ii How to obtain R and P(block).