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Customer Concentration	12 Months Ended
	May 31, 2017
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Customer Concentration	NOTE 8 Customer Concentration During fiscal 2017, no individual customer had net sales exceeding 10 percent of total net sales. During fiscal 2016, net sales to Sun Home Services, Inc. (“Sun Home”) totaled $22,231,000 or 10 percent of total net sales. Based on past sales to Sun Home, the Corporation could have a material adverse effect on its financial condition and results of operations if the Corporation experienced a loss of this customer or if the volume of sales significantly decreased.

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