Consider a local car dealership that gathers data on changes in demand and consumer income for its cars in a particular year. When the average real income of its customers falls 25%, the sale of new cars plummets 50%, all other things unchanged. However, the sale of used cars increases by 10%. Calculate and interpret the income elasticity of demand for new and used cars. Identify the type of goods new and used cars are. Your identification should be based on your elasticity calculation.