Set a product price to be automatically calculated based on time (hours) by selecting “Hour (automatic)” as the unit.
For the product price, you set the rate for a full hour.
To calculate the product price, the system uses the start and end time of the activity to which the product is linked.
If the product has been added as a "single product" in an event, the start and end time of the entire day will be used instead.
Note: When this setting is enabled, the product will also be eligible for automatic price calculation in existing events. The product price will only be updated once you make a change to the times in the schedule.