BRIEF-Warren Buffett, Charlie Munger, Ajit Jain make comments at... Buffett says first quarter was weak at all four of our furniture operations Buffett says he would not get excited about so-called alternative investments Buffett says people who made decision to invest in amazon are as much value investors as he is Buffett says berkshire portfolio managers todd combs, ted weschler are 'absolutely following value principles" in investing, including whoever invested in amazon.com Buffett says 'you could not have two better operating managers' than berkshire vice chairmen greg abel, ajit jain Buffett, asked why other berkshire leaders don't answer shareholder questions at annual meeting, says 'this format won't be around forever' Buffett says precision castparts' profit margins are below what was projected 2 years ago Buffett says he expects precision castparts' earnings to improve significantly Vice chairman ajit jain, who oversees berkshire insurance businesses, says he avoids many insurance contracts because there is a lack of data to "hang our hat on" Buffett says he says he is pleased to be partners with 3g capital, but they have more of a taste for paying up Buffett says it is 'conceivable' that something could come up where berkshire and 3g would work together again, and that in some cases 'they are way better operators' Buffett says he likes apple inc very much but wishes price was lower so he could buy more Buffett says he has been surprised by how little people have moved into houses, hurting u.s.