6. Linda owns a hair salon and has determined the total and marginal number of haircuts per hour that can be performed in her salon using different amounts of labor. ... a. See excel for chart b. Linda's marginal revenue product curve is downward sloping and the same as the demand curve. c. At a wage rate of $40, Linda's optimal level of employment is 4 stylist(s). d. If the wage rate increases to $60, Linda's new optimal level of employment is 3 stylist(s)