A man sold 20 articles for $60 and gained 20%. How many articles should he sell for $60 to incur a loss 20%?  Pick
A) 30 B) 36 C) 40 D) 50 E) 48
Production cost per article: $60*(100%-20%) / 20 = $2.40   Required production costs for a loss of 20%: $60*(100% + 20%) = $72   Number of articles to be sold for $72 to incur a 20% loss: $72 / $2.40 = 30   Thus, solution 30 is correct.72 /  2.40= 
<gadget id="calculator">72 /  2.40</gadget>
<output>30</output>
30   Thus, solution 30 is correct.
<result>A</result>
A man sold 20 articles for $60 and gained 20%. How many articles should he sell for $60 to incur a loss 20%?