The manager of Zelta Corporation's southeast region, Art McCormick, must improve the in vestment center's margin in order to achieve the performance goals established for his segment of the company. A \(5 \%\) increase in sales price would achieve the desired margin. After meeting with the sales and marketing staff, however, Art is sure that an increase in sales price would result in a loss of sales and that target income would not be achieved, even though margins would increase. If sales prices cannot be increased, how can Art attain the desired margins?