Question
Ethan buys a shirt, a skirt and a coat. The average cost of these items is $84. The cost of the coat is four times the total cost of the shirt and the skirt. If the shirt costs $20, find the difference in cost between the skirt and the coat.
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Ethan buys a shirt, a skirt and a coat. The average cost of these items is $84. The cost of the coat is four times the total cost of the shirt and the skirt. If the shirt costs $20, find the difference in cost between the skirt and the coat.