Costing for service

Summary:

How to caculated costing for item service

Content (please ensure you mask any confidential information):

Dear Team,

We sell some service items whose prices are calculated based on various resources and shared costs.
For example: Item service A, Unit "Month" with 1 Month = 0.5 resource A + 0.5 resource B + 10 overhead C.
They will not have any raw materials.
We would like to inquire about the operation and calculation method in this case when the item service A does not manage inventory.
Should we still create WD and WO for this?

Version (include the version you are using, if applicable):

24C

Code Snippet (add any code snippets that support your topic, if applicable):