Three people go out for a picnic, A buys 2 kilograms of pie, B buys 4 kilograms, and C buys no food. In order to make the three people share the cost equally, C takes out 6 yuan, so how much should be distributed to A.
三个人外出野炊，甲买2千克馅饼，乙买4千克，丙没有买食品，为使三人平均分担这次费用，丙拿出了6元钱，那么应分配给甲多少元．
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