Uncle Wang earns 2,000 yuan in the first year, and then earns 250 yuan more every year. Aunt Li earns 1,000 yuan in the first half year, and then earns 50 yuan more every half year. Who earns the most in three years?
王叔叔第一年挣2000元，以后每年多挣250元，李阿姨头半年挣1000元，以后每半年多挣50元，3年中谁挣的钱多？
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