Retro Costing process goes back earlier than Process Start Date MCS

Summary:

I have a situation for this scenario below:

We used data below:

Pay Date: 10/13/23

Pay Period Start Date: 09/17/23

Pay Period End Date: 09/30/23

I have an employee that has Retro Costing activity back to 9/5/2021.

I ran the Calculate Retroactive Process with a Start Date: 10/30/2022.

When I ran the Payroll Costing Report, it shows transaction showing dates to 9/5/2021.

When choosing a Start Date in the Calculate Retroactive Process, in the PCR, does that date reflect the Period Start Date, Process Date or Accounting Date?

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