Brittany's quilted comforter has many 1-foot by 1-foot colored squares. The comforter had 14 red squares, 4 more blue squares than red squares, 6 more green squares than blue squares, and 12 fewer white squares than green squares.  How many square feet is Brittany's comforter?
Please reason step by step, and put your final answer within \boxed{}.
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