By selling a basket for $ 19.50, a shopkeeper gains 30%.

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By selling a basket for $ 19.50, a shopkeeper gains 30%. For how much should he sell it to gain 40 %?

Let CP of basket be $ y.
∴ 130% of y = 19.50

⇒	130 × y	= 19.50
	100

⇒ y =	19.50 × 100	= $ 15
	130

For 40% gain,

SP =	140 × 15	= $ 21
	100

We can find required answer with the help of given formula :

C.P. = C.P			100 + profit%
			100

C.P. =	19.50 × 100
	100 + 30

C.P. =	1950	= Rs. 15
	130

New S.P. = C.P ×			100 + profit%
			100

New S.P. = 15			100 + 40
			100

New S.P. =	15 × 140
	100

New S.P. =	210	= $ 21
	10