Blow Molding & Hollow Plastic Products worked example

Resin Cost per Bottle at 110% resin cost allocation share: a worked example

What does the result look like when resin cost allocation share reaches 110%? The full calculation is worked below with real intermediate numbers. a blow molding estimator needs a defensible resin cost for a bottle, container, or hollow product run

The inputs for this scenario

  • Bottles or containers in production run: 50,000 units (unchanged)
  • Resin cost per bottle: 0.08 $ / unit (unchanged)
  • Resin cost allocation share: 110 % (raised for this scenario; the documented default is 100)
  • Fixed resin handling and purge cost: 450 $ (unchanged)

Working through the calculation

  • Applying the documented formula (Allocated variable resin cost = bottles or containers in run × resin cost per bottle × resin cost allocation share) to the inputs above produces each figure below.
  • At this operating point the engine returns 4,960 $ for total bottle resin cost, the number this scenario is built around.
  • At this operating point the engine returns 0.1 $ / bottle for resin cost per bottle.
  • At this operating point the engine returns 4,510 $ for allocated variable resin cost.
  • At this operating point the engine returns 450 $ for fixed resin handling cost.

How this compares with the baseline

  • Against the tool's baseline example, where resin cost allocation share sits at 100% and the headline result is 4,550 $, this scenario comes in 9.01% above the baseline at 4,960 $.
  • A figure at this level is achievable when resin cost allocation share is genuinely sustained, not just peaked for a shift. It treats resin cost per bottle as a fixed input, so it does not model regrind blending, resin price tiers, or weight drift from process variation, all of which can swing real cost by several percent.

Results at a glance

  • Total bottle resin cost: 4,960 $ (headline result)
  • Resin cost per bottle: 0.1 $ / bottle
  • Allocated variable resin cost: 4,510 $
  • Fixed resin handling cost: 450 $

Run it with your numbers

  • Every input above is editable in the live Resin Cost per Bottle calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.