1. Suppose we have a good whose quantity supplied changed from 100 to 120 units when the price increased from $10 to $12 per unit. Compute the price elasticity of supply using the midpoint method

mid point elasticity of supply=((Q2-Q1)/(Q2+Q1)/2)/(P2-P1)/((P2+P1)/2) =(20/115)/(2/(11/2)) =0.478