It is Not Project Operations

Although a lot of the functionality is similar between Field Service and Project Operations. Pricing functionality is not.
This has confused many of colleagues, in particular if they come from Project Operations (PSA) to Field Service. Instead it is similar to Sales functionality.

Sales Price in Field Service

I want to highlight the functionality of the Sales price for a product in Field Service.

A work order has a pricing list associated with it. This field ‘Price List’ is mandatory currently. Shortly,
it will no longer be enforced (Release Wave 2 2021), the aim is to allow FS to be operational without enforcing pricing.
David Clarke and Jason Cohen have a good video on this.

Sales Price Rules

The ‘Sales Price’ will be the taken from the ‘Price List Item’ for the ‘Price List’ in the work order.
If this ‘Price List Item’ is zero or it does not exist, then the ‘List Price’ from the Product record will be used.
If this does not exist then a zero value will be used.

Remember: the entitlements as this has capability to override the ‘Price List’ used. But that’s a subject for another day.
But I would like to point out that entitlements are focused for a specific customer.