In a certain code language, 'RA + FE' is coded as ‘246', and 'AB + JC…

1  2    3    4   5    6   7     8    9  10  11  12  13

 A   B   C    D   E    F   G    H    I    J    K    L   M

 ↓    ↓    ↓    ↓    ↓     ↓   ↓    ↓     ↓   ↓    ↓    ↓    ↓

 Z   Y    X   W   V    U   T    S    R   Q   P    O   N

26  25  24  23  22  21  20  19  18  17  16  15  14

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THE LOGIC FOLLOWED HERE IS:

RA + FE

SO WE HAVE

R + F = 18 + 6 = 24

A + E = 1 + 5 = 6

THE CODE IS 246

AND,

AB + JC

SO WE HAVE

A + J = 1 + 10 = 11

B + C = 2 + 3 = 5

THE CODE IS 115

SIMILARLY

AC + BD

SO WE HAVE

A + B = 1 + 2 = 3

C + D = 3 + 4 = 7

THE CODE IS 37