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LDHEI'IDUEIDFI margin Sally:r IiIomoam,r sells 28,000 units at $4? per unit. 1Iu'ariable costs are $26.32 per unit, and xed costs are $330,100. Determine (a) the contribution margin ratio, {b} the unit contribution margin, and {c} operating income. a. Contribution margin ratio {Enter as a whole number.) E \"ii: I}. Unit contribution margin [Round to the nearest cent.) C per unit {2. Operating income C