Construction Machinery & Attachments worked example

Cost per Attachment at 72% cost scope included: a worked example

Suppose cost scope included falls to 72%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate total cost per construction attachment build, kit, or shipped unit.

The inputs for this scenario

  • Attachments in the build or quote lot: 22 units (held at the documented default)
  • Variable cost per attachment: 4,150 $ / unit (held at the documented default)
  • Cost scope included: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed engineering, fixture, and setup cost: 12,500 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable attachment cost = attachments in the build or quote lot × variable cost per attachment × cost scope included.
  • total attachment cost works out to 78,236 $ at these inputs, and this is the headline figure for the scenario.
  • cost per attachment works out to 3,556 $ / piece at these inputs.
  • variable attachment cost works out to 65,736 $ at these inputs.
  • fixed engineering, fixture, and setup cost works out to 12,500 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where cost scope included sits at 100% and the headline result is 103,800 $, this scenario comes in 24.63% below the baseline at 78,236 $.
  • It computes total attachment cost and per-piece cost by adding scoped variable build cost to fixed engineering, fixture, and setup cost across a given lot. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • total attachment cost: 78,236 $ (headline result)
  • cost per attachment: 3,556 $ / piece
  • variable attachment cost: 65,736 $
  • fixed engineering, fixture, and setup cost: 12,500 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Cost per Attachment calculator, set cost scope included to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.