sample program to produce summary information on sales report.
The program will input Data of Salesman Id, Item code, and number of cuestomer. Sales id is 5digit long, and items code range from 100-300
if Item code is 100-150, display " aim high" if item code is 150-200, display "good sales" if item code is 250-300, display "excellent sales"
each customer should not purchase 3 items at once
final report should produce folling summary Salesman ID Item code no of customers 12356 100 1 45678 112 2