A farmer has 4 fields. Each field produces a certain number of bushels of wheat. The second field produces twice as many bushels as the first field, the third field produces three times as many bushels as the first field, and the fourth field produces four times as many bushels as the first field. If the total production from all four fields is 1200 bushels, how many bushels of wheat does each field produce? Let's think step by step and output the final answer within \boxed{}.
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