Specific value to be added from a value derived from a conditional value

Hi,
This is the DAX i used for Band Col below:

BAND_COL = if (Table A[PROD] in {"TL","SS", "SE"}
                      && Table A[CODE] = "BBC"
                      && Table A[COUNTRY] in {"ENG", "UNK"},
                       "ML (P1),

                      if (Table A[PROD] = "FL"
                      && Table A[CODE] = "BBC"
                      && Table A[COUNTRY] = "ENG",
                       "FL (P1),

                      if (Table A[PROD] = "PT"
                      && Table A[CODE] = "BBC"
                      && Table A[COUNTRY] = "ENG"
                       "PTML (P1)"

And this measure below is what i tried to create for the required calculation i am trying to get the right results for. It seems to be giving the right value for FL (P1) where the sum needs to be done from a figure from Table A with a value from Table B, but i can't get the other values as normal for "ML (P1)", "PTML (P1)”.

Measure =

VAR LT =

SWITCH(

        TRUE(

                      SELECTEDVALUE(Table A[PROD] in {"TL","SS", "SE"}
                      && SELECTEDVALUE(Table A[CODE] = "BBC"
                      && SELECTEDVALUE(Table A[COUNTRY] in {"ENG", "UNK"},
                       "ML (P1)",

                     SELECTEDVALUE(Table A[PROD] = "FL"
                      && SELECTEDVALUE(Table A[CODE] = "BBC"
                      && SELECTEDVALUE(Table A[COUNTRY] = "ENG",
                       "FL (P1)”,

                      SELECTEDVALUE(Table A[PROD] = "PT"
                      && SELECTEDVALUE(Table A[CODE] = "BBC"
                      && SELECTEDVALUE(Table A[COUNTRY] = "ENG"
                       "PTML (P1)”

VAR X90 = CALCULATE(
                     SUM(TABLE A [BALANCE]),

                    TREATAS(VALUES(TABLE C [DISTINCT COUNT], TABLE A [BUCKET COL])
                    )

VAR TBVALUE = CALCULATE(

           LOOKUPVALUE(

                              TABLE B [SUB_AMOUNT],

                               TABLE B [DOM] = “MPA”

                              TABLE B [PTCOL] = “ICRP2”

                             ))
RETURN

IF(

    LT = "FL (P1)”,

   X90 + IF (ISBLANK (TBVALUE, 0, TBVALUE),

LT

Hope i could explain better and for any info please let me know. 

Appreciate a lot for your effort to help.