A grinder was marked at ₹ 3,600. After given a discount

A grinder was marked at ₹ 3,600. After given a discount of 10% the dealer made a profit of 8%. Calculate the cost price.

Here , marked price = ₹ 3,600 , discount = 10% , profit = 8%
If the C.P. of grinder be y, then

y × 108	=	3600 × 90	= 3240
100		100

⇒ y =	3240 × 100	= ₹ 3000
	108

Second method :
Given that , M.P. = ₹ 3600, D = 10%, r = 8%, C.P. = ?

M.P.	=	100 + r
C.P.	=	100 − D

3600	=	100 + 8
C.P.	=	100 − 10

C.P. =	3600 × 90
	108

C.P. =	3600 × 10	= ₹ 3000
	12