I want to know where exactly we found earning desc fields in payslip template?

Summary:

I have downloaded the payslip in which we have Earning description section which has Earning description, begin date, end date, hours worked, rate, multiple and amount fields. I want to know where exactly we found those fields in the main template or sub template. I have gone through the main template and sub templates but no where i did not find those section with respective above mentioned fields.Want to customize few fields as part of testing.

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