Bioplastics & Biomaterials Processing worked example

Bioplastic Scrap Cost at 72% scrap cost allocation share: a worked example

Suppose scrap cost allocation share 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 scrap cost from rejected PLA, PHA, PBAT, starch blend, sheet, film, pellet, or molded part weight and material cost assumptions.

The inputs for this scenario

  • Scrapped bioplastic weight: 420 kg or lb (held at the documented default)
  • Material cost of scrapped resin: 4.15 $ / kg or lb (held at the documented default)
  • Scrap cost allocation share: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed scrap handling or disposal cost: 260 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Allocated variable scrap cost = scrapped bioplastic weight × material cost of scrapped resin × scrap cost allocation share.
  • Total bioplastic scrap cost works out to 1,515 $ at these inputs, and this is the headline figure for the scenario.
  • Scrapped resin cost per weight unit works out to 3.61 $ / kg or lb at these inputs.
  • Allocated variable scrap cost works out to 1,255 $ at these inputs.
  • Fixed scrap handling or disposal cost works out to 260 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where scrap cost allocation share sits at 100% and the headline result is 2,003 $, this scenario comes in 24.37% below the baseline at 1,515 $.
  • It computes total scrap cost by multiplying scrapped weight by material cost per unit and an allocation share, then adding fixed handling or disposal cost. 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 bioplastic scrap cost: 1,515 $ (headline result)
  • Scrapped resin cost per weight unit: 3.61 $ / kg or lb
  • Allocated variable scrap cost: 1,255 $
  • Fixed scrap handling or disposal cost: 260 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Bioplastic Scrap Cost calculator, set scrap cost allocation share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.