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Learn about the most flexible step in Parabola — the Custom transform step. Curious to learn more? Check out our bonus lesson on prompting best practices and sample prompts.

Building challenge

This lesson was added after the course’s initial release, so you won’t see this step in subsequent screenshots.
1

Add a Custom transform step

Beneath the Add math column step on the “Calculate revenue by row and assign statuses” card, add a Custom transform step.
2

Paste in the instructions

In the instructions field, paste:Calculate a column called “Revenue” by multiplying “Line Item Price” times “Units”. Format the value as currency with 2 decimal places (ex. $1,000.00).
3

Optimize the prompt

Once the step processes, click “Optimize this prompt”.
Check your work
Last modified on March 5, 2026