28 Complete the missing information in the columns below: B Sales Variable Costs Operating Assets Controllable Margin Return On Investment $100,000 (a) (b) $30,000 10% (d) $45,000 (e) $450,000 (9) $1,000,000 (h ) $100,000 (f) 10% $25,000 Required Rate of Return Controllable Fixed Costs Residual Income 8% $20,000 (c) (1) 12% $155,000 -$5,000 $2,000