Hi there, 

you will be basically looking at the quantity difference with the price point and you will calculate both A and B price elasticity (when we see already B is more elastic with a greater loss of good sold). 

For each A and B add numbers to make it easy. For example initial price was $100 and initial number of goods sold was 100. Then you apply the changes and you calculate for both 

Price Elasticity = (∆Q/Q) ÷ (∆P/P)

• Qi = Initial quantity
• Qf = Final quantity
• Pi = Initial price and
• Pf = Final price

I got for A elasticity 1,5 while for B 10, meaning B is highly elastic. 

Lucie

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