Annabelle works in a department store selling clothing. She makes a guaranteed salary of $500 per week, but is paid a commision on top of her base salary equal to 30% of her total sales for the week. How much would Annabelle make in a week in which she made $2400 in sales? How much would Annabelle make in a week if she made xx dollars in sales? Earnings when selling $2400:
Earnings when selling $x: