Try:
SELECT
#VLOANDED.AIDNO,
#VLOANDED.ALOANUMBER,
SUM(#VLOANDED.APRINR_PMT) AS SUM_PRIN,
SUM(#VLOANDED.AINTR_PMT) AS SUM_INT,
SUM(#VTRANS.BAMOUNT) AS SUM_AMT
FROM
#VLOANDED
JOIN #VTRANS
ON #VLOANDED.AIDNO = #VTRANS.BIDNO
AND #VLOANDED.ALOANUMBER = #VTRANS.BLOANUMBER
GROUP BY
#VLOANDED.AIDNO,
#VLOANDED.ALOANUMBER
;