The Cost of Capital at Berkshire Hathaway

I don't have a good answer to a question I consider kind of a stupid question. What is the cost of capital at Berkshire Hathaway when we keep drowning in this torrent of cash which we have to reinvest? There's really only two questions that get to that, but you don't need a mathematical answer. We are not looking to have Berkshire sell at the highest possible price and we're not looking to try and attract people to Berkshire who are buying stocks because somebody else recommends them to them.