Let's denote the cost price of the article for Latif as
Latif sells the article to Raza at a gain of 25%. This means Raza's purchase price is calculated as follows:
Raza then sells the article to Rashid at a gain of 20%. Therefore, Rashid's purchase price is:
We know that Rashid pays Rs. 3600, so we set up the equation:
Now, we can solve for
Thus, the cost price of the article for Latif is Rs. 2400.