CustomerID, Duration, Charge, ToNumber
INT, INT, DOUBLE, BIGINT
1,1,1,13212320002
1,40,0.8,13012310000
1,50,4,13212320001
1,80,1.6,13012310001
1,180,3.6,13012310002
2,2,2,13312330003
2,72,1.44,13312330002
2,80,1.7,13212320003
2,270,5.4,13312330001
3,54,1.08,13412340001
3,60,3,13312330004
3,80,1.8,13512350001
3,850,17,13412340002
4,10,21,13512350001
5,60,40,13512350002