Coordinate Geometry: JEE Main 2020 Mathematics question

If the line, 2x - y + 3 = 0 is at a distance ${1 \over {\sqrt 5 }}$ and ${2 \over {\sqrt 5 }}$ from the lines 4x - 2y + $\alpha$ = 0 and 6x - 3y + $\beta$ = 0, respectively, then the sum of all possible values of $\alpha$ and $\beta$ is :