As an example, GlaxoSmithKline spends 8.826M GBP/13.8683M USD on marketing/sales and cost of business, and 4.009 GBP/6.2993M USD on research.
Most of them make this publicly available on their financial reports on their websites.
http://www.gsk.com/investors/reps11/GSK-Annual-Report-2011.p...
Page 136