Background job for price update in purchasing service contract (ME32K)

Hello SAP Guru's,

Can you help me with the following question?

In our company, we have several contracts for service items. For each of these services we have defined several price periods, with of course different prices per price period.
Currently, we have to manually do the price determination through the menu Service Specifications - Prices - Find new. After that, the new prices are implemented in the contract.

Our business has requested if it is possible to generate a background job that automatically performs the price determination.
I have tried performing an update through RM06ENP0, but this only updates the single level items.
Is there another way we can set this up?

For your information: our company is working on SAP ERP 6.0

Below a screenshot of the current way of working.

Thank you in advance for your help,