how to store value in variable from store procedure?

Question

store procedure :

Set @total = ( select SUM(w.FinalAmount) from ChequeDetailsWO  cdw

inner join WO w on cdw.WOCode = w.WOCode

inner join SupplierMaster sm on cdw.SupplierCode = sm.SupplierCode

inner join YearMaster ym on cdw.FinancialYear = ym.YearId

where AdvancePayment = 'true'

and cdw.SupplierCode = coalesce(@suppliercode,cdw.SupplierCode)

and cdw.WOCode = coalesce(@wocode,cdw.WOCode)  

and cdw.FinancialYear = coalesce(@year,cdw.FinancialYear)

and w.WODate between coalesce(@datefrom,w.WODate) and coalesce(@dateto,w.WODate)  )

 select @total as 'tt', ym.Year 'Financial Year', sm.SupplierName,w.WONumber,Convert(nvarchar,w.WODate,106)'WODate',w.FinalAmount,cdw.ChequeNumber,Convert(nvarchar,cdw.ChequeDate,106)'ChequeDate',cdw.TDS from ChequeDetailsWO  cdw

inner join WO w on cdw.WOCode = w.WOCode

inner join SupplierMaster sm on cdw.SupplierCode = sm.SupplierCode

inner join YearMaster ym on cdw.FinancialYear = ym.YearId

where AdvancePayment = 'true'

and cdw.SupplierCode = coalesce(@suppliercode,cdw.SupplierCode)

and cdw.WOCode = coalesce(@wocode,cdw.WOCode)  

and cdw.FinancialYear = coalesce(@year,cdw.FinancialYear)

and w.WODate between coalesce(@datefrom,w.WODate) and coalesce(@dateto,w.WODate)

order by sm.SupplierName

i want to store @total on my page in variable "t"

 t = ds.Tables[0].Rows[0]["@total"].ToString();

            Label3.Text = t.ToString();