Answer:
Operating profit margin = operating profits ÷ turnover
= 405000 ÷ 4,050,000
= 0.1 = 10%
ROI = Net operating Income/ Average Operating assets
= 405,000 ÷ 1620,000
= 0.25 = 25%
(note: Average operating assets = ( opening operating assets + closing operating assets ) ÷ 2 )
Turnover = sales/ average operating assets
= 4,050,000/ 1620,000
= 2.5
Residual income
minimum required return = minimum required rate of return × average operating assets
= 15% × 1620000
= 243000
Residual income = net operating income - minimum required return
= 162000