Block's Sells 500 Bottles of Perfume a Month When the Price

Block's sells 500 bottles of perfume a month when the price is $7.A huge increase in resource costs causes price to rise to $9 and Block's only manages to sell 460 bottles of perfume.The price elasticity of demand is:

A) 0.33 and elastic.
B) 3.0 and elastic.
C) 0.33 and inelastic.
D) 3.0 and inelastic.
The change in quantity is (500 - 460) /(500 + 460) = 0.0417 and the change in price is (7 - 9) /(7 + 9) = 0.125.Elasticity,then is 0.0417/0.125 = 0.33.