A shopkeeper sold an article at $100 with 30% profit. Then find its cost price?  Choose one:
A) $120
B) $100
C) $91
D) $77
E) $69
cost price = selling price *100/(100+profit)   C.P. = 100*100/130 = $77(approximately)   Answer is $77
<result>D</result>
A shopkeeper sold an article at $100 with 30% profit. Then find its cost price?