hi how to calculate total profit between two dates?

Write a stored procedure and consume it in your website/web-application. You can get help from http://www.c-sharpcorner.com/UploadFile/gtomar/storedprocedure12052007003126AM/storedprocedure.aspx

Your procedure would be like this -

CREATE PROCEDURE myProcedueName
 @START_DATE DATE,
 @END_DATE        DATE
AS
        BEGIN
        SET NOCOUNT ON;

        SELECT ISNULL( SUM ( csProfit ) , 0 )
        FROM tblCurrencySale
        WHERE csDate BETWEEN  @START_DATE   AND    @END_DATE       
        END
GO