Common Elements of Two Arithmetic Sequences
Number Theory
Find the last 3 digits of the sum of all elements common to sets $A$ and $B$.$$\begin{align*}
A &= \{1, 4, 7, 10, \dots,\ 3\times 2024 + 1\}\\
B &= \{2, 6, 10, 14, \dots,\ 4\times 2024 + 2\}
\end{align*}$$