A company manufactures a product for $? 50$. It sold it to a dealer for $? 60$. The dealer sold it to a shopkeeper for $? 75$. The shopkeeper sold it to a customer for $? 100$. Find the profit percentage of the company.
(A) $16 \frac{2}{3} \%$
(B) $25 \%$
(C) $20 \%$
(D) $33 \frac{1}{3} \%$