Wiser Group sells a single product for $30 per unit. The variable costs for each unit are $7.50, while the total fixed costs are $4,500. If a 10% sales commission is introduced, what is the new contribution margin ratio? 75% No change 65% 72.5% Ingram Ltd. has, for the last 17 years, manufactured tools used in construction. The company has the following information available for the past year: Total sales $425,000 Total operating income $38,000 Degree of operating leverage 9.50 If sales decreased by 5%, what is the new operating income