Firstly, thanks for playing!
Unlocking the combination cabinet is probably the point where most players get stuck. The note on the cabinet is meant to provide a clue for what order you should input the numbers. But it seems most players have difficulty working out what the clues mean.
I'll be re-working this puzzle in the next update, hopefully it'll make a bit more sense and be easier to solve.
Thanks so much for the feedback, it's really helpful.