A dishonest dealer professes to sell goods at the cost price but uses a false weight and gains 25%. Find his false weight age?  Pick one:
A) 878 B) 768 C) 800 D) 778 E) 876
25 = E/(1000 - E) * 100   1000 - E = 4E   1000 = 5E =&gt; E = 200   1000 - 200= 
<gadget id="calculator">1000 - 200</gadget>
<output>800</output>
800   Answer:800
<result>C</result>
A dishonest dealer professes to sell goods at the cost price but uses a false weight and gains 25%. Find his false weight age?