Answer:
(1) 6%; 1.7; 10.20%
(2) 3%; 4; 12% 
Step-by-step explanation:
ROI = Margin × Turnover (Note Margin in % and Turnover in Ratio) 
 
Where, 
Margin = Net operating income ÷ Sales 
Turnover = Sales ÷ Average operating assets
For Queensland:
Margin = 54,060 ÷ 901,000
 = 6% (approx)
Turnover = 901,000 ÷ 530,000
 = 1.7
ROI = 6% × 1.7
 = 10.20%
For New south wales:
Margin = 74,400 ÷ 2,480,000
 = 3% (approx)
Turnover = 2,480,000 ÷ 6,20,000
 = 4
ROI = 3% × 4
 = 12%