Stone, Countertops & Engineered Surfaces worked example

Install Kit Cost at 68% kit utilization rate: a worked example

This worked example runs the install kit cost numbers for a tougher week than the baseline: 68% kit utilization rate instead of the typical 95%. Estimates the install-kit consumable cost for countertop fabrication jobs covering adhesives, seam hardware, and mounting supplies.

The inputs for this scenario

  • Countertop installs completed: 80 jobs (held at the documented default)
  • Kit cost per install: 35 $/job (held at the documented default)
  • Kit utilization rate: 68 % (the input this scenario stresses; the baseline uses 95)
  • Restock minimum charge: 250 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Install kit cost $ = installs x kit cost per job x utilization% + restock minimum.
  • Total install kit cost works out to 2,154 $ at these inputs, and this is the headline figure for the scenario.
  • Install kit cost per unit works out to 26.93 $ / piece at these inputs.
  • Variable install kit cost works out to 1,904 $ at these inputs.
  • Fixed install kit cost adder works out to 250 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where kit utilization rate sits at 95% and the headline result is 2,910 $, this scenario comes in 25.98% below the baseline at 2,154 $.
  • Use it when pricing a batch of installs, reconciling monthly install-consumable spend against jobs completed, or comparing kit suppliers. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total install kit cost: 2,154 $ (headline result)
  • Install kit cost per unit: 26.93 $ / piece
  • Variable install kit cost: 1,904 $
  • Fixed install kit cost adder: 250 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Install Kit Cost calculator, set kit utilization rate to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.