I have this right now:

```
<%= f.select :credit, (0..500) %>

```

This will result in this:

```
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
<option value="5">5</option>
<option value="6">6</option>
<option value="7">7</option>
<option value="8">8</option>
<option value="9">9</option>
...

```

How would I add another option in that select that would be "**All**" and which value should be **nil**?