For the year ending December 31, 2020, Cobb Company aceumulates the following data for the Plastics Division which it operates as an inves tment center. contribution margin $690,700 budget, 5704,536 actual controllable fored costs $298,900 budset. $304,900 actual. Average operating assets foc the year were $1,959,000. Prepare a responsiblity report for the Plastics Division beginning with contribution margin for the year ending December 31.2020 . (Round ROI to 1 decimal place, es 1.5\%) DBB COMPANY astics Division onsibility Report Ended December 31, 2020 Difference Favorable Unfavorable Neither Favorable Actual nor Unfavorable $ % %