A 2011 report by the management consulting firm O'Rourke Group Partners indicated that a generic \$14 polo shirt sold in Canada and made in Bangladesh actually costs a retailer only \(\$ 5.67\) (Maclean's, 2013; Ecouterre, n.d.). Assuming a constant marginal cost, calculate the retailer's price/marginal cost ratio, its Lerner Index, and the elasticity of demand it believes it faces (assuming that it is trying to maximize its short-run profit).