Let's say you already have a resource with a field for the number of guests.
For example, an hourly resource with a price of $100 / hour.
Now, create a pricing component for the extra charge for each guest over 8.
1. Enter a name for the component.
2. Enter the name of the formula parameter for the number of guests.
For example, GUESTS.
3. Enter the formula.
We multiply $100 by the number of guests over eight.
And all this is multiplied by [INTERVALS] — the number of reserved hours.
100 * ([GUESTS] - 8) * [INTERVALS]
4. Click the Constraints tab.
The formula will be negative if the number of guests is less than eight.
To avoid this, set 9 as a minimal number of guests.
Now the pricing component will be applied only if the number of guests is 9 or more.
You will get the following configuration:
Choose 2 hours and 11 guests.
Formula: 100 * (11-8)*2 = $600.
Look at the example in action.