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

# How Selly Works

> Understand the full flow from acquiring inventory to tracking profit.

## The Reseller Flow

Selly is built around the way a resale business actually works. Every feature maps to a step in your workflow.

```
Acquire → List → Sell → Analyze
```

## Step-by-Step Breakdown

### 1. Acquire Items

When you buy something to resell, log it in **Inventory**. Enter:

* What the item is (name, brand)
* What you paid for it (cost)
* The sizes and quantities you have
* When you acquired it

This gives Selly the cost-of-goods data it needs to calculate your actual profit later.

### 2. List Items for Sale

When an item goes live on a marketplace, update its status to **Listed** in Inventory and set your asking price. Listing an item:

* Shows it on your **Storefront** automatically
* Includes it in your **Inventory Value** stat
* Makes it available to select when recording a sale

### 3. Record Sales

When an item sells, log it on the **Dashboard**. You enter the sale price, platform, and date. Selly automatically:

* Marks the unit as **Sold**
* Removes it from your Storefront
* Calculates the profit (sale price minus the cost you entered in inventory)
* Updates your Dashboard and Performance metrics

### 4. Log Expenses

Beyond what you paid for each item, your business has overhead. Log it on the **Expenses** page:

* Shipping supplies and postage
* Marketplace fees and payment processing
* Storage and rent
* Tools, apps, and subscriptions

These subtract from your gross profit to give you your true **net profit**.

### 5. Analyze Performance

Use the **Performance** page to review how your business is doing over any time period. See which items make you the most money, how your revenue trends over time, and what your actual margins are.

## How Profit is Calculated

| Term             | Formula                           |
| ---------------- | --------------------------------- |
| **Gross Profit** | Sale Price − Cost of Goods        |
| **Net Profit**   | Gross Profit − Expenses           |
| **Margin**       | (Gross Profit ÷ Sale Price) × 100 |

<Note>
  Expenses are spread across all sales in the same period — they're not tied to a specific item. For the most accurate net profit, log expenses regularly.
</Note>

## How Units Work

Every item in Selly is made up of **units**. If you bought 3 pairs of the same shoe in different sizes, that's 1 item with 3 units. Each unit tracks independently:

* Its own size
* Its own status (Unlisted / Listed / Sold)
* Its own cost and sale price

This lets you partially sell an item — list and sell individual units while others remain in inventory.

## Date Filtering

Every page in Selly responds to the date range picker in the top right. This controls which time period all metrics and tables reflect.

| Preset           | What it shows                     |
| ---------------- | --------------------------------- |
| **YTD**          | January 1 through today           |
| **MTD**          | First of this month through today |
| **Last 30 days** | Rolling 30-day window             |
| **Custom**       | Any range you specify             |

<Tip>
  Use custom date ranges to compare specific drops, sales periods, or restocking events.
</Tip>