# A shopkeeper expects a gain of 22 1/2% on his cost price. If in a week, his sale was of Rs. 392, what was his profit ?

$\par&space;C.P.&space;=&space;Rs.$ $\left(\frac{100}{122.50}\times&space;392)\right)$

$\par&space;=&space;Rs.$ $\left(\frac{1000}{1225}\times&space;392)\right)$

$\par&space;=&space;Rs.&space;320$

$\par&space;Profit&space;=&space;Rs.&space;(392&space;-&space;320)&space;=&space;Rs.72$