When you say:
I earn fifty dollars a week scarcely.
I know this is not correct. It doesn't sound right and you can't apply an adverb to "a week" because it doesn't make sense and that's not the point you're trying to convey. So this would be a misplaced modifier. However, I do not know how to correct this. The best attempts I have come up with is:
I scarcely earn fifty dollars a week.
I earn scarcely fifty dollars a week.
I have a feeling the first one is right but also think that the second one makes more grammatical sense. Which one is right?