Find the sum of all the values in all the corresponding variables of A, B & C respectively in the given data
A1 Balance 300 . .
A2 ACC_no . 1234 .
A3 card_no . . 56789
A4 Balance 340 . .
A5 card_no . . 43215
A6 ACC_no . 4321 .
B1 Balance 560 . .
B2 card_no . . 67456
B3 card_no . . 78986
B4 ACC_no . 3421 .
B5 ACC_no . 2314 .
C1 Balance 321 . .
C2 Balance 345 . .
C3 Balance 213 . .
columns id, type, balance, acc_no, card_no
A1 Balance 300 . .
A2 ACC_no . 1234 .
A3 card_no . . 56789
A4 Balance 340 . .
A5 card_no . . 43215
A6 ACC_no . 4321 .
B1 Balance 560 . .
B2 card_no . . 67456
B3 card_no . . 78986
B4 ACC_no . 3421 .
B5 ACC_no . 2314 .
C1 Balance 321 . .
C2 Balance 345 . .
C3 Balance 213 . .
columns id, type, balance, acc_no, card_no