A watch was sold at a loss of 10%. If it was sold for Rs.210 more, there would have been a gain of 4%. What is the cost price?	Select the correct option:
A) s:1000
B) s:1500
C) s:1278
D) s:1028
E) s:1027
90%   104%   --------   14% ---- 210   100% ---- ? =&gt;   Rs:1500   Answer: s:1500
<result>B</result>
A watch was sold at a loss of 10%. If it was sold for Rs.210 more, there would have been a gain of 4%. What is the cost price?