Isaiah wants to attend Stanford. One year at Stanford costs approximately $45,000. He currently has $5,000 in savings. Isaiah has received a one-time grant for $2,000 and an annual academic scholarship for $20,000. He plans to enroll in the work study program that will pay $15,000 annually for part-time work. How much will Isaiah need to borrow in student loans in order to attend Stanford for 4 years?