Use the following table for a hypothetical single-product economy. year units of output price per unit price index (1=100) 1 10 10 100 2 12 20 200 3 15 30 300 4 20 40 400 Refer to the above data. Nominal GDP in year 3 is: a) $100. b) $150. c) $225. d) $450. ANSWER: d) $450.