Answer:
1. ROI = Margin * Turnover
Margin = Net operating income / Sales
= 150,000 / 3,000,000
= 5%
Turnover = Sales / Average operating assets
= 3,000,000 / 750,000
= 4 times
ROI = 5% * 4
= 20%
2. Sales will increase by 50% and NOI will increase by 200%.
Margin = (150,000 * (1 + 200%)) / (3,000,000 * ( 1 + 50%))
= 10%
Turnover = (3,000,000 * ( 1 + 50%)) / 750,000
= 6
ROI = 10% * 6
= 60%
3. Sales will increase by $1,000,000. Average operating assets by $250,000 and NOI will increase by $200,000
Margin = (150,000 + 200,000) / (3,000,000 + 1,000,000)
= 8.75%
Turnover = (3,000,000 + 1,000,000) / (750,000 + 250,000)
= 4
ROI = 8.75% * 4
= 35%