Program that simulates the minute-by-minute operation of a checkout line, such as one you might find in a retail store. Showcases:
- The total number of customers serviced
- The total number of customers who found the line too long and left the store.
- The average time per customer spent in line
- The average number of customers in line
- The number of irate customers (those that had to wait at least IrateCustomerThreshold minutes)