DECLARE RunningTotalCursor
CURSOR LOCAL FAST_FORWARD FOR
    SELECT rawtrxid, forcount, emppin
    FROM dbo.rawtrx
    ORDER BY rawtrxid
	

OPEN RunningTotalCursor

DECLARE @rawtrxid INT
DECLARE @forcount int
declare @emppin int

DECLARE @RunningTotal int
SET @RunningTotal = 0

DECLARE @Results TABLE
(
    rawtrxid INT NOT NULL PRIMARY KEY,
    forcount int,
	emppin int,
    RunningTotal int
)

FETCH NEXT FROM RunningTotalCursor
INTO @rawtrxid, @forcount, @emppin

WHILE @@FETCH_STATUS = 0
BEGIN
    SET @RunningTotal = @RunningTotal + @forcount
	
    INSERT @Results
    VALUES (@rawtrxid, @forcount, @emppin, @RunningTotal)
	
    FETCH NEXT FROM RunningTotalCursor
    INTO @rawtrxid, @forcount, @emppin

END

CLOSE RunningTotalCursor

DEALLOCATE RunningTotalCursor

SELECT *
FROM @Results
ORDER BY rawtrxid

rawtrxid    forcount    emppin      RunningTotal
----------- ----------- ----------- ------------
7           1           2           1
8           1           2           2
9           1           2           3
11          1           1           4
12          1           1           5
13          1           2           6

rawtrxid    forcount    emppin      RunningTotal
----------- ----------- ----------- ------------
7           1           2           1
8           1           2           2
9           1           2           3
11          1           1           1
12          1           1           2
13          1           2           1

RawTrxId	int	Unchecked
EmpName	char(50)	Checked
EmpPin	numeric(18, 0)	Checked
trxDate	datetime	Checked
trxTime	datetime	Checked
forkey	char(50)	Checked
fordelete	bit	Checked
forcount	numeric(1, 0)	Checked

rawtrxid    forcount    emppin      RunningTotal
----------- ----------- ----------- ------------
7           1           2           1
8           1           2           2
9           1           2           3
11          1           1           4
12          1           1           5
13          1           2           6

rawtrxid    forcount    emppin      RunningTotal
----------- ----------- ----------- ------------
7           1           2           1
8           1           2           2
9           1           2           3
11          1           1           4
12          1           1           5
13          1           2           6

create table #rawtrxid
(
	RawTrxID int,
	ForCount int,
	EmpPin int,
	Total int
)

insert #rawtrxid
	select 7, 1, 2, null union all
	select 8, 1, 2, null union all
	select 9, 1, 2, null union all
	select 11, 1, 1, null union all
	select 12, 1, 1, null union all
	select 13, 1, 2, null

select * from #rawtrxid

--Here is your cursor method
	DECLARE RunningTotalCursor
	CURSOR LOCAL FAST_FORWARD FOR
		SELECT rawtrxid, forcount, emppin
		FROM #rawtrxid
		ORDER BY rawtrxid
		

	OPEN RunningTotalCursor

	DECLARE @rawtrxid INT
	DECLARE @forcount int
	declare @emppin int

	DECLARE @RunningTotal int
	SET @RunningTotal = 0

	declare @PrevEmpPin int = -1

	DECLARE @Results TABLE
	(
		rawtrxid INT NOT NULL PRIMARY KEY,
		forcount int,
		emppin int,
		RunningTotal int
	)

	FETCH NEXT FROM RunningTotalCursor
	INTO @rawtrxid, @forcount, @emppin

	WHILE @@FETCH_STATUS = 0
	BEGIN
		if @emppin <> @PrevEmpPin
		begin
			Set @RunningTotal = 0
			Set @PrevEmpPin = @emppin	
		end
		
		SET @RunningTotal = @RunningTotal + @forcount
		
		INSERT @Results
		VALUES (@rawtrxid, @forcount, @emppin, @RunningTotal)
		
		FETCH NEXT FROM RunningTotalCursor
		INTO @rawtrxid, @forcount, @emppin

	END

	CLOSE RunningTotalCursor

	DEALLOCATE RunningTotalCursor

	SELECT *
	FROM @Results
	ORDER BY rawtrxid

--Here is the quirky update method
	declare @PrevEmpPin int
	declare @RunningTotal int = 0
	update #rawtrxid
	set @RunningTotal = Total = case when EmpPin = @PrevEmpPin then @RunningTotal + ForCount Else ForCount End,
		@PrevEmpPin = EmpPin
	from #rawtrxid WITH (TABLOCKX) 
	OPTION (MAXDOP 1)
	
	select * from #rawtrxid

drop table #rawtrxid