customer1,10
customer2,20
customer3,30
customer4,40
customer5,50
customer6,60
customer7,70
customer8,80
customer9,90
customer10,100
customer11,110
customer12,120
customer13,130
customer14,140
customer15,150
customer16,160
customer17,170
customer18,180
customer19,190
customer20,200