How to suppress Negitive Values

[#1]

Dear All

No	Name	Amt1	Commi
101	Sankar	100	200
101	Sankar	-25	0
102	ram	200	100
102	ram	-50	0

i wat to suppress Negitive values and Zero's

help me please.......................

Regards

Sankar

[#2]

Thx for your reply.