manipulate a field with information obtained from 2 other fields
I have 3 fields, initial km, final km and total km, the total km field must be filled with the result of final km - initial km. How can I do this manipulation in this total km field.
![](https://answer-overflow-discord-attachments.s3.amazonaws.com/1112458167016763482/image.png)
2 Replies
I managed to solve my question as follows:
![](https://answer-overflow-discord-attachments.s3.amazonaws.com/1112722139548766268/image.png)