The Table Below Shows the Total Output and Prices for an Economy

The table below shows the total output and prices for an economy that produces only two goods,potatoes and oil.Data is provided for the years 2005 and 2015.
Quantities Produced Prices
TABLE 20-6
-Refer to Table 20-6.What is the real GDP for 2005 if 2015 is the base year?

A) $6750
B) $7975
C) $9000
D) $10 500
E) $20 100