zcust_group related issue

HI

in a report the data is displaying like this

ZCUST_GROUP   ZAMOUNT

000122                  10000

000123                   2900

MARK                     40000

TUBA                       400000

AMITH                    38900

The user wants to see the names of the groups first then the numbers.what we have done is we just sorted it.and shown the names first and then the numbers.

ZCUST_GROUP        ZAMOUNT

MARK

TUBA

AMITH

000122

000123

But now my user wants to see the names first starting with A and in order

could you plz help me to resolve this issue