Sorting based on Variable

[marishnagendran]

Dear All,

Date	Product	Product_Type	Gross Profit	Net Profit	Margin
11-Jun	A	Test	10	8	2
11-Jun	B	Test	20	15	5
11-Jun	C	Test	30	20	10
11-Jun	D	Test	15	10	5
11-Jun	E	Test	20	5	15

Above is my table. There are 3 columns user defined in front end (i.e) Gross Profit,Net Profit, Margin

If I click Gross profit button then column sorted by asc. if i click Net profit button it sorted by asc same as Margin

Is it possible??