Diamonodback Enterprises is an established supermarket chain. Their most recent dividend payment was $1.20. Analysts expect this to grow 3% p.a. for the first four years and then 2.9% p.a. thereafter. Diamondback's return on equity is expected to be 8.5% p.a. and it has 1250 million stocks on issue. What is the market value of the company (trading ex-dividend) in $billion correct to 2 decimal places ?