Construction Products, Windows, Doors & Fenestration worked example

Job Lot Cost at 72% share of cost included in this job lot: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop share of cost included in this job lot to 72%, then walk the calculation through step by step. Estimate total job lot cost for a mixed construction-products order from unit count, lot cost per unit, scope, and fixed project adders.

The inputs for this scenario

  • Job lot units or openings: 310 units (held at the documented default)
  • Burdened cost per unit or opening: 246 $ / unit (held at the documented default)
  • Share of cost included in this job lot: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed project management, freight, and jobsite setup cost: 9,800 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable job lot cost = job lot units or openings × burdened job lot cost per unit × job lot cost scope included.
  • total job lot cost works out to 64,707 $ at these inputs, and this is the headline figure for the scenario.
  • job lot cost per unit works out to 209 $ / piece at these inputs.
  • variable job lot cost works out to 54,907 $ at these inputs.
  • fixed project management, freight, and setup cost works out to 9,800 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where share of cost included in this job lot sits at 100% and the headline result is 86,060 $, this scenario comes in 24.81% below the baseline at 64,707 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to share of cost included in this job lot, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. A single burdened per-unit rate assumes a uniform product mix; jobs with a wide spread of window sizes and types need either a weighted rate or separate lines per product.

Results at a glance

  • total job lot cost: 64,707 $ (headline result)
  • job lot cost per unit: 209 $ / piece
  • variable job lot cost: 54,907 $
  • fixed project management, freight, and setup cost: 9,800 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Job Lot Cost calculator, set share of cost included in this job lot to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.