I urgently need help with this problem, and i cant get it for the life of me!

"Alex works part time at a clothing store. She is paid an hourly rate of 10.25/h, and also earns a commision of 3.5% of her total weekly sales.

Alex works at the store 12 hours a week.

If Alex's goal is to earn 150$ every week, what do her total weekly sales need to be?"

Please help!