Connor works in a department store selling clothing. He makes a guaranteed salary of $300 per week, but is paid a commission on top of his base salary equal to 5% of his total sales for the week. How much would Connor make in a week in which he made $2175 in sales? How much would Connor make in a week if he made xx dollars in sales? Earnings when selling $2175:??

Earnings when selling $x: ??