Congratulations! You've just gotten a job at a new clothing store in the mall. If you work 20 hours each week, you can earn a base salary of $150. On top of that, you get a commission of 10% of
all sales that you make. In your first week of working, you sold $300 of merchandise. In your
second and third weeks, you sold $500 and $1000 of merchandise.

1. How much did you earn in total for each of those weeks, assuming you worked 20 hours each
week?