Data Cleaning Exercises

Input table:Inputs are read-only. Every step works on a copy.
Input table transactions, rows 1 to 9 of 9
#
1twnh2sale128.99
2tthzjsale3529
3tkv8bsale8988.5
4two43sale280.05
5tgsijsale11052.01
6t958jrefund-3290.10
7tbd8esale2294.10
8tu51rsale1710.05
9thfhmsale5000.00

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Final output not ready yet: column "needs_review" does not exist. Add steps that produce every output column, or adjust them in Final output.

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A worked solution becomes available after your first check or once you've used every hint.

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