# Event Budget & Cost Split Example

Plan an event budget in Calcul.io with line-item costs, a service charge, a final total, and a per-guest split that updates as the guest count changes.

## Event budget and cost split

Keep venue, food, and extras on their own lines, apply a service charge once, and see the fair share for each guest. The sample budget is for eight people.

```calculio
venue = 480$
food = 360$
drinks = 180$
extras = 75$
subtotal = venue + food + drinks + extras
service = subtotal * 12%
total = subtotal + service
guests = 8
perGuest = total / guests
```

## How it works

1. Replace the line-item amounts with your quotes or receipts.
2. Change the percentage on the `service` line if the venue uses a different fee.
3. Change `guests` to see the per-guest cost update without touching the total.

Because the fee and split are named values, you can add a discount or deposit as another line and keep the audit trail visible.

[Next: calculate a freelance invoice](https://calcul.io/examples/freelance-invoice/index.md)