A man sold 20 articles for $60 and gained 20%. How many articles should he sell for $70 to incur a loss 20%?
Choose the correct choice:
A) 45
B) 35
C) 40
D) 50
E) 48
Production cost per article: $60*(100%-20%) / 20 = $2.40   Required production costs for a loss of 20%: $70*(100% + 20%) = $84   Number of articles to be sold for $84 to incur a 20% loss: $84 / $2.40 = 35   Thus, solution 35 is correct.84 /  2.40= 
<gadget id="calculator">84 /  2.40</gadget>
<output>35</output>
35   Thus, solution 35 is correct.
<result>B</result>
A man sold 20 articles for $60 and gained 20%. How many articles should he sell for $70 to incur a loss 20%?