How do I answer this?

Beginning in 2004, people in Vidinstan began producing a third good, borjin, in addition to sladke and gamza. Borjin is sold in individual units. The table below shows the number of tons of sladke, liters of gamza, and units of borjin sold each year from 2004 to 2007. In 2004, sladke cost $10 per ton, gamza cost $2 per liter, and borjin cost $0.50 per unit. Year Sladke (in tons) Gamza (in liters) Borjin (in units) 2004 95 600 4,000 2005 100 620 4,500 2006 97 600 4,300 2007 102 650 5,000 How much did RGDP increase from 2006 to 2007, using 2004 as the base- price year? Answer here