> ## Documentation Index
> Fetch the complete documentation index at: https://parabola.io/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Fundamentals and building challenge

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In this course, you'll build a **Sales by Category Report** — a flow that automatically calculates total sales broken down by product category. Even if this doesn't resemble a process you manage day-to-day, it's a perfect example for learning the fundamentals.

<Frame>
  <img src="https://mintcdn.com/parabola-7119dfb0/CAGXdc7-yLmtAwae/images/general-operators-operationalizing-canvas.png?fit=max&auto=format&n=CAGXdc7-yLmtAwae&q=85&s=fe2c56a717346ab01535b38436874dd1" alt="Completed Sales by Category Report flow" width="3450" height="1856" data-path="images/general-operators-operationalizing-canvas.png" />
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<Card icon="sparkles" title="Building challenge">
  To get started, create your flow and download the two sample data files you'll use throughout this course.

  [**Create your flow**](https://parabola.io/api/clipboard/4c2c2c41-e09f-4039-96b1-caaefd4c9807/copy_to_flow?name=Parabola+University+101+Building+Challenge)

  **Download your sample data:**

  * [Sales data](https://drive.usercontent.google.com/u/1/uc?id=1dtQeW-MKtBT0jAwhaegxijZyk7Wyrt-V\&export=download)
  * [Product categories](https://drive.usercontent.google.com/u/1/uc?id=1QFsrK6CZv0ClKgZ-8ihr95drRYeNu_oA\&export=download)
</Card>