How to find sum of effort value after grouping by date

I have following MDX query, I need to find sum(Microsoft_VSTS_Scheduling_Effort) after group by date. 

WITH
SET [Date Range] AS
		Filter(
			[Date].[Date].[Date],
			[Date].[Date].CurrentMember.Member_Value >= CDate(@StartDateParam) AND
			[Date].[Date].CurrentMember.Member_Value <= CDate(@EndDateParam)
		)
	 MEMBER [Measures].[DateValue] AS [Date].[Date].CurrentMember.Member_Value

SELECT
{
	[Measures].[Microsoft_VSTS_Scheduling_Effort]
} ON COLUMNS,
{
	CrossJoin(
                                [Date Range],
		[Work Item].[System_State].[System_State],
		[Work Item].[Iteration Path].[Iteration Path]
	)
} ON ROWS
FROM
(
	SELECT
		CrossJoin(
			StrToMember("[Team Project].[Project Node GUID].&[{" + @ProjectGuid + "}]"),
                StrToSet('{[Work Item].[System_WorkItemType].&[Product Backlog Item],[Work Item].[System_WorkItemType].&[Bug]}'),
                StrToSet('{[Work Item].[System_State].&[New],[Work Item].[System_State].&[Approved],[Work Item].[System_State].&[Committed],[Work Item].[System_State].&[Done]}'),
(	Filter( 
							[Work Item].[Iteration Path].[Iteration Path].Members, 
iif([Work Item].[Iteration Path].currentmember.Properties( 'Member_Caption') = @WorkItemIterationPath OR Instr( [Work Item].[Iteration Path].currentmember.Properties( 'Member_Caption'),  @WorkItemIterationPath1 )  = 1,1,0)				 )
                )
		) ON COLUMNS
	FROM [Team System]
)