Hi Everyone!! I need help- please..

National Gypsum Sheathing is manufactured in Mount Holly North Carolina and my Project is located In Silver Spring , Maryland . The distance from North Carolina to Maryland is under 500 miles but the Sheathing will make a "pit stop" at our fabrication department (located in PA) to be applied to another product. Do I have to include the "pit stop" mileage in the distance to job site?

"I'm new at this so please bare with me"