Consider a market value-weighted index consisting of Apple (AAPL) and Facebook (FB) stocks. Their price and market value information are provided below:

• AAPL initial price ($) = 120
• AAPL final price ($) = 130
• AAPL initial and final number of shares (billions) = 18
• FB initial price ($) = 300
• FB final price ($) = 290
• FB initial and final number of shares (billions) = 2.5

What is the return on the index? For simplicity, you can drop "billions".