Pam Lucas is a high school student who delivers papers to earn spending money. During May, she received $450 from customers in payment for their subscriptions for the month. She paid $300 for the papers she delivered. In addition, she paid $45 to her parents for use of their car to deliver the papers, and she paid $30 for gas. Prepare a statement to compute the amount of profit Pam earned from her paper route in May.