For each problem you must do the following:

1. Write/type out the word problem.
2. Set up the three equations that you will use to solve this problem.
3. Decide and state which matrix method you will use to solve the problem: Inverse Matrices, Cramer's Rule, Gaussian Elimination, or Gauss-Jordan Elimination.
4. Solve the problem using the method you chose in #3. Be sure to show all of your work.
5. Check your solutions by plugging them into all three of the original equations to be sure they are valid. Show your work for this as well.

Question

Dawn, Bob, and Susan all work in a clothing store. One day the three of them had combined sales of $1480. Dawn sold $120 more than Bob. Also, Bob and Susan combined to sell $280 more than Dawn. How much did each person sell in total for the day?