3. Let the set $A=\{1,2,3\}, X=\{4 x+y \mid x, y \in A\}, Y=\{4 x-y \mid x, y \in A\}$, then the sum of the elements in $X \cap Y$ is $\qquad$
$$
X=\{5,6,7,9,10,11,13,14,15\}, Y=\{1,2,3,5,6,7,9,10,11\}
$$
$\Rightarrow X \cap Y=\{5,6,7,9,10,11\}$, so the sum of the elements in $X \cap Y$ is 48.