Current Attempt in Progress X Your answer is incorrect. Presented below is information related to the Southern Division of Lumber, Inc. Contribution margin Controllable margin Average operating assets Minimum rate of return $1,240,500 $1,016,000 $4,064,000 16 % Compute the Southern Division's return on investment and residual income. Return on investment 30.52 % Residual income $ 1722335 e Textbook and Media