A degree program cost $50,000 in total expenses: $30,000 in tuition and $20,000 in housing and books. The US government provides a grant for $10,000 of the tuition. Moreover, the university pays $20,000 of the $30,000 tuition in salary to your instructors. Being in the program is so much fun, you would be willing to a net of $5,000 for the pleasure, relative to your alternatives. What is the net cost of the education to you?