Consider the following information regarding a person's decision to go to college college tuition is $20,000 per year, room and board is $10,000 per year, and books and materials are $2,000 per year. Suppose that instead of going to college this person could have camed $18,000 working in a store. An economist would calculate the cost of going to college O a $20,000 O b. $18,000 O c. 550,000 O d. $32,000. o e. $30,000