Question

How to find the C.P or S.p of an object if gain / loss is given ?

Answer 1

to find c.p or s.p see the formula given below
c.p is the cost price we buy from the trader and sp is the selling price that we sell it
for example
if a pen cost5 rupees from trader we buy it and sell it for 7 rupees so to find profit
s.p - c.p
that is 7-5
=2 rupees profit
and example for loss
if a pen =7 rupees
we sell it for =5 rupees
so c.p-s.p=loss
7-5 = 2

Answer 2

Profit=SP-CP
Loss=CP-SP 
eg P=62-32=30
l=32-12=20