Final answer:
The country's highest real GDP was in 2016, calculated by using 2015 prices as the base year.
Step-by-step explanation:
To determine when the country's real GDP was highest, we need to calculate the real GDP for each year using the base year prices of 2015. Real GDP is calculated by multiplying the quantities of goods produced by their prices in the base year.
2014 Real GDP: (500 movies × $11 per movie) + (1000 popcorns × $4 per popcorn) = $5,500 + $4,000 = $9,500
2015 Real GDP: (600 movies × $11 per movie) + (900 popcorns × $4 per popcorn) = $6,600 + $3,600 = $10,200
2016 Real GDP: (650 movies × $11 per movie) + (950 popcorns × $4 per popcorn) = $7,150 + $3,800 = $10,950
2017 Real GDP: (625 movies × $11 per movie) + (925 popcorns × $4 per popcorn) = $6,875 + $3,700 = $10,575
Looking at the numbers, the highest real GDP was in 2016.