A man sold 20 articles for $60 and gained 20%. How many articles should he sell for $80 to incur a loss 20%? Choose the correct choice: A) 45 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%: $80*(100% + 20%) = $96   Number of articles to be sold for $96 to incur a 20% loss: $96/ $2.40 = 40   Thus, solution 40 is correct.96/  2.40= 
<gadget id="calculator">96/  2.40</gadget>
<output>40</output>
40   Thus, solution 40 is correct.
<result>C</result>
A man sold 20 articles for $60 and gained 20%. How many articles should he sell for $80 to incur a loss 20%?