Suppose that Macy's now decides to utilize technology to replace all cashiers with a single RFID checkout machine which is able to checkout very fast in seconds and has the service time exponentially distributed. If you know that on average the number of customers in the store $($this includs customers shopping around the store, customers waiting in line to be checked out, and the customer being checked out$)$ is $60,$ what is the service rate of this RFID machine?