.l CALCULATION OF ELASTICITY POINT Price of X Quantity Demanded of X Quantity Supplied of X Consumers' Income Price of 2 Quantity Demanded of Z A :2 250 400 1000 20 225 B 25 50 500 1000 20 225 C :2 40 400 1000 30 200 D :2 450 400 1400 20 225 Note: In all these examples we use the point of departure Price, quantity, income for the second part of the formula for elasticity. This is called pointeelasticity