SELECT (ROUND((50 * TRATINGTEST.BFUELSPGR) / (LV_LKK.BK / (ROUND(LV_LKK.BK - ROUND(ROUND(0.7 * ROUND(1 - LV_LKK.BK, 4), 4) * 0.25, 4), 4))), 2)) AS BFCR1, ; SRATINGTEST.IID ; FROM VSO3!TRATINGTEST ; JOIN VSO3!SRATINGTEST ; ON TRATINGTEST.IID = SRATINGTEST.IPID ; JOIN VSO3VIEWS!LV_LKK ; ON SRATINGTEST.IID = LV_LKK.IID ; JOIN VSO3VIEWS!LV_LKFUELCONSTIME ; ON SRATINGTEST.IID = LV_LKFUELCONSTIME.IIDPlease advise.