For a typical townhouse project with 120 units, this translates to a total of 1,200 interior doors and 240 exterior doors for the entire project. Additionally, trim requirements are critical in ensuring the final aesthetic and functionality. Each unit typically needs 350 to 500 linear feet of trim, which includes baseboards, door casings, window trims, and other decorative profiles. As the project scale grows, so does the need for precise quantity estimation to ensure timely procurement and cost-effective management.