Calculating the price elasticity of supply antonio is a retired teacher who lives in chicago and teaches tennis lessons for extra cash. at a wage of $30 per hour, he is willing to teach 6 hours per week. at $50 per hour, he is willing to teach 16 hours per week. using the midpoint method, the elasticity of antonio’s labor supply between the wages of $30 and $50 per hour is approximately , which means that antonio’s supply of labor over this wage range is