Completing the model
1. Bring up object window of 'Miles per year'. Redefine it as edit table index by Car type and Year.
2. Enter the values as shown in screenshot below
3. Select 'Fuel cost', on the expr re-define it as an edit table indexed by Car type, and Year.
4. Ctrl+R. {Your test result would be similar with the screenshot}
4. Go back to main diagram.
5. Bring up result table of 'Total cost'. 6. Compare your result table with the screenshot below.
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