A man buys an article and sells it at a profit of 20%. If he had bought it at 20% less and sold it for Rs.85 less, he could have gained 25%. What is the cost price?  Choose the correct choice from the following.
A) s.370
B) s.375
C) s.425
D) s.350
E) s.300
s.425P1 = 100 SP1 = 120   s.425P2 = 80 SP2 = 80 * (125/100)= 
<gadget id="calculator">80 * (125/100)</gadget>
<output>100</output>
100   20 ----- 100   85 ----- ?=&gt; 425   ANSWER:s.425
<result>C</result>
A man buys an article and sells it at a profit of 20%. If he had bought it at 20% less and sold it for Rs.85 less, he could have gained 25%. What is the cost price?