The status bar for each of your formulas can be either set as Draft or Active.
1. Draft means that you are still working on it or are not sure about a specific formula.
2. Active means that the formula can already be used.
To set a Price Formula on Draft, just click on ACTIONS, then on Set as Draft. Confirm on the pop-up and that's all.
Keep in mind: You can't Set as Draft or delete a Default Formula. You can only edit it.