Suppose that in 2015, a typical U.S. student attending a state-supported college bought 10 textbooks at a price of $100 per book and enrolled in 25 credit hours of coursework at a price of $360 per credit hour. In 2016, the typical student continued to purchase 10 textbooks and enroll in 25 credit hours, but the price of a textbook rose to $110 per book, and the tuition price increased to $400 per credit hour. The base year for computing a "student price index" using this information is 2015. What is the value of the student price index in 2015? In 2016? Show your work.