How are they entered, as misc charges in the bill?

I believe so.  At the bottom of each BOM, in the Maintenance option, I see Labor - Operators, Labor - Packers and Overhead.  Each has a Quantity per Bill, Average Cost, and Cost of Bill field.  I would like to update the Cost of Bill for both labor component and the overhead component.  I would also like to make the changes effective as of 7/01/22.  I do not want to change any of the material component costs.  Any guidance would be GREATLY appreciated.

I believe so.  At the bottom of each BOM, in the Maintenance option, I see Labor - Operators, Labor - Packers and Overhead.  Each has a Quantity per Bill, Average Cost, and Cost of Bill field.  I would like to update the Cost of Bill for both labor component and the overhead component.  I would also like to make the changes effective as of 7/01/22.  I do not want to change any of the material component costs.  Any guidance would be GREATLY appreciated.