Last year Clarkson Company had operating income of $320,000 Clarksons operating assets at the end of the period totaled $2,400,000 which represents a $300,000 increase over the beginning balance Clarksons minimum rate of return is 9% and the firm uses average operating assets for performance valuation purposes if Clarkson raises its minimum rate of return for 9% to 11% the. what will be the effect on its residual income