How to find profit margin, Asset turnover ratio and ROI by using the given information?

Results from Extreme Corporations' most recent year of operations are presented in the following table (in 000's): Sales $35,000 Pre tax Income $13,000 Fixed Assets $ 7,100 Current Liabilities $4,600 Long term liabilities $ 2,400 Target rate of return 14% Weighted Average Cost of Capital 12% Tax rate 30% Gross Margin 75% Current ratio 1.50 Calculate the following: a) Profit margin b) Asset turnover c) ROI