Lack of Basic cost info in the given problem it is assumed 
that base cost is 10000 and solved the problem.

Basic cost                  = 10000
Add: CST @4%                =   400
Add: Frieght and insurance  =   200

Total Base cost             = 10600

Add: Profit@15% on SP       =  1871
   (10600*15/85)

Selling price               = 12471.

Logic:

In the problem profit is given as a percentage of sale 
price.if the selling price is 100, profit at 15% on selling 
price is equals to 85.

Which means the total base cost is equals to 85 and profit 
is equals to 15 and total selling price is equals to 100.
Which i considered as a calcualtion part for deriving the 
profit figure.

If any body has any queries you can contact on my email id
chalapathirao.govada@genpact.com