I think its actually the expression I have.
SELECT [Dealer Contact Info].intDealerNum, [Dealer Contact Info].txtDealer, [Dealer Contact Info].txtContact, [Warrenty Log].txtName, [Warrenty Log].dtmSent, Sum(Date()-[dtmSent]) AS [Total Days], [Warrenty Log].curGcost, [Warrenty Log].curSCcost...