CAB is 6, HI is 8 and ON is 12.
How much is XYZ?
A, B and C are on the “2” button on a phone keyboard. A+B+C=2+2+2=6. H and I are on the “4” button. H+I=4+4=8. N and O are on the “6” button. N+O=6+6=12. X, Y and Z are on the “9” button. X+Y+Z=9+9+9=27.