urgent please

Hi

can anyone tell me how to do this ,my output list display is as shown below

ACCOUNT AMMOUNT

54100160 100

54100160 200

54100160 300

54100160 400

54100160 50

54100160 20

54100170 10

54100170 12

54100170 13

54100170 14

54100170 15

54100170 21

54100180 22

54100180 23

54100180 20

54100180 20

54100180 20

54100180 20

54100180 20

and it want it to display it in this format

ACCOUNT AMMOUNT

54100160 1,050.00

54100170 85

54100180 145

Thanks & Regards

Lalith