Simple Economic Question

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simple_question1.xlsx

Sheet1

Cost Current Price Current Quantity Current Profit New Price Price change Break even quanity? break even d(Q) Oberved Q Observed d(Q) elasticity optimal price optimal quantity
Young $ 20 $220 1800 360000 $ 240 9% 1,636 -9% 1000 -44%
old $ 30 $250 300 66000 $ 230 -8% 330 10% 600 100%

Sheet2

Sheet3