Calculate Total Sum in SQL Stored Procedure

I would like to have a new field that showes the total sum of netsales for all of the records specified in my criteria. Is there a simple way to do this?
Here is what I have so far:
ALTER PROCEDURE spSalesAnalysis
--Exec spSalesAnalysis 2559,2921,0
(
@BegDate as int,
@EndDate as int,
@SalesRep as smallint
)


AS

SELECT c.datenk as fiscaldate, c.fiscalweek, a.salesrepwk, b.salesrepname, b.salesregion, b.salesregionname as regionname,
d.customername as customer, a.salesdatewk, a.customerwk, a.invoice, a.invoiceline, a.itemwk, a.fiscaldatewk, a.unitofissue, a.quantityordered,
a.quantitysold, a.extendedprice, a.extendedpromotions, a.marketingallowances, a.deposits, a.salestax, a.freightservicefees,
a.telxonfees, a.othercharges, a.extendedretail, a.extendedcost, a.costallowances, a.shippingwarehouse, a.customcategorycode, a.customcategorystyle,
a.customcategorydesc, a.source, a.internalcost, a.buyercost, a.creditinvoiceflag, a.commission, a.itemtax,


case when a.salesDateWK between @BegDate and @EndDate then a.extendedprice - a.extendedpromotions + a.Marketingallowances +
a.deposits + a.salestax + a.freightservicefees + a.telxonfees + a.othercharges end as netsales

into #tempSales

from factcustsales a
INNER JOIN DimSalesRep b
     ON a.SalesRepWK = b.SalesRepWK
INNER JOIN DimCalendar c
     ON a.salesdatewk  = c.DateWK
INNER JOIN DimCustomer d
     ON a.CustomerWK = d.CustomerWK

WHERE  
a.salesrepwk = b.salesrepwk and
b.salesregion in ('4') and
d.warehousetransfer = ('No') and
a.creditinvoiceflag <> ('RB')and
a.salesdateWK between @BegDate and @EndDate

select  distinct fiscaldate, invoice, customer, salesrepwk, salesrepname, sum(netsales)as netsales
from #tempsales

group by Salesrepname, fiscaldate, customer, invoice, salesrepwk


order by invoice desc