Query With 2 Sets Of Data

I am trying to query one table and get two different timeperiods of data, I am summing monthly totals to provide a running year total, but I also need last month's total in a seperate column. This is what I have so far but the subquery makes me group it which provides duplicate grouping.DECLARE @LASTPD AS INT

SET @LASTPD = (SELECT MAX(LASTPERIOD) FROM TABLE)

SELECT NAME,

POST_PD AS [MONTH],SUM(CHARGE_AMOUNT) AS MONTHLY_$,

LASTMONTH.LAST_MONTH,(SELECT SUM(CHARGE_AMOUNT) AS LAST_MONTH

FROM TABLE INNER JOIN TABLE2

ON TABLE2.NAME = TABLE.NAME

WHERE POST_PD = @LASTPD

AND TABLE2.NUM= 539

GROUP BY NAME) AS LASTMONTH

INTO #TEMP_SAFROM TABLE

INNER JOIN TABLE2

ON TABLE2.NAME = TABLE.NAME,(SELECT SUM(CHARGE_AMOUNT) AS LAST_MONTH

FROM TABLEWHERE TABLE2.NUM = 539

GROUP BY NAME, POST_PDORDER BY NAME, POST_PD

SELECT NAME,

             LAST_MONTH,

CAST(SUM(MONTHLY_$)AS DECIMAL(20,2)) AS YEARLY_$

FROM #TEMP_SA

GROUP BY NAME

ORDER BY NAME