On Monday, Dalaya had $15. On Tuesday, she bought a t-shirt for $12. On Wednesday, she found $5.50 on the street. On Friday, she found $3 in her pocket, and then she spent $8 on a cheeseburger for lunch.


Write an addition problem to represent the changing amounts of money Dalaya has.
Find the amount of money Dalaya has by the end of Friday. Show your work to justify your answer.