Teeeeaaasssser Time!

Today's teaser tests your knowledge of ratios. As is the norm, first five finishing (correctly) and emailing the answer receive 10 bonus points, or, suggest something else, and we'll see if we can work it out.

Here's the teaser:

 If $15.20 is divided among Andrew, Joseph, and Samantha so that Joseph has one more dollar than Andrew and Samantha has $2.70 more than Joseph, how much does each individual receive?

Good Luck!