When a number is multiplied by $\frac { 1 } { 3 }$, it equals the two-digit natural number $AB$, and when multiplied by $\frac { 1 } { 8 }$, it equals the two-digit natural number $BA$.
Given this, what is the sum $A + B$?\\
A) 7\\
B) 8\\
C) 9\\
D) 10\\
E) 11