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Money · Guided lesson

Choose a demand-limited product mix

About 19 minutes · 4 reading + 15 practice and checks
Time includes reading, practice, and questions. Extra videos or further study are optional.
See this course’s project requirements

A two-product costing and constrained-capacity model with contribution, overhead, bottleneck minutes and a demand-limited production recommendation.

Keep your working files in your own notebook or software. Save a private description, checklist, and work link in My Proof.

What to include

  • A cost-classification and unit-cost schedule.
  • A contribution schedule and two-product profit bridge.
  • An overhead-rate and applied-versus-actual reconciliation.
  • A capacity feasibility and contribution-per-minute table.
  • A checked feasible product mix with an explicit tie and resource ledger.
  • A price/capacity sensitivity and conditional product-mix recommendation.

Review and revise

Use these criteria to check your work and choose what to improve.

  • Costs: behavior, units and overhead assignment are explicit.
  • Feasibility: time/demand/whole-unit constraints hold.
  • Objective: contribution and fixed-pool profit reconcile.
  • Decision: ties and changed-price/capacity scenarios are checked.
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Before you begin

The idea in everyday life

Original fictional practice. All money is USD. No account, payment, personal record or outside participation is required. Fictional workshop sells whole units only. Product A: price 30, variable material 12, variable labor 6, bottleneck 6 min, demand cap 50. Product B: price 24, material 8, labor 4, bottleneck 4 min, demand cap 80. Available bottleneck time 600 min. Monthly fixed manufacturing overhead 600, budget activity 600 min (rate 1/min). All produced units sell within demand limits; no inventory, other constraints or taxes in this bounded model.

The idea

A feasible maximum can have more than one equally good mix.

Follow along

Choose a demand-limited product mix — complete worked case

A feasible maximum can have more than one equally good mix.

Fictional workshop sells whole units only. Product A: price 30, variable material 12, variable labor 6, bottleneck 6 min, demand cap 50. Product B: price 24, material 8, labor 4, bottleneck 4 min, demand cap 80. Available bottleneck time 600 min. Monthly fixed manufacturing overhead 600, budget activity 600 min (rate 1/min). All produced units sell within demand limits; no inventory, other constraints or taxes in this bounded model.

Two products

Paste at A1.

AProductBPriceCMaterialDVariable laborEMachine minFMax demand
A30126650
B2484480

Copy as plain text
  1. 1. 5.1 Choose

    Allocate B up to its 80 demand cap, then divide remaining 280 min by 6 and round whole A units down.

    You should see: 46 A fits;47 A would exceed 600 when B remains 80.

  2. 2. 5.2 Choose

    Calculate used time, unused time, contribution and overhead-adjusted profit.

    You should see: 596 used,4 spare,1,512 contribution,912 profit.

  3. 3. 5.3 Choose

    Check A-first and the 79 B/47 A alternative explicitly.

    You should see: A-first 900 profit;79 B/47 A ties 912.

  4. 4. 5.4 Choose

    Enumerate A=0 through 50 on paper with B=min(80, floor((600−6×A)/4)), or run the supplied original Python. Keep all maximizing feasible rows, not one falsely unique result.

    You should see: The three maxima are (46,80), (47,79) and (48,78), each with 1,512 contribution. Used minutes are 596, 598 and 600 respectively.

Now change one thing

Changed capacity is 540 minutes. 75 B units use four minutes each; A uses six minutes each and demand permits up to 50 A. Enter the maximum whole A units that fit.

Your work

What to finish

A checked feasible product mix with an explicit tie and resource ledger.

Common mistake

Watch for this

Rounding up remaining units or calling the first priority plan uniquely optimal.

How can I tell I understand it?

Verify that your completed checked feasible product mix with an explicit tie and resource ledger meets the three lesson-specific checks and retains the supporting original records.

Try 3 questions

Quick knowledge check

Answer all 3 questions. Get at least 2 right and the lesson completes automatically.

Not yet passed

You’ll get an explanation for each answer. Signed in? Your results save to your account.

180 B plus 47 A consume how many minutes?
279 B/47 A and 80 B/46 A both contribute 1,512. What claim is accurate?
31,512 contribution minus 600 fixed overhead yields which modeled operating profit?
0 of 3 answeredApply the lesson to a short question, then review the explanation.
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Finish this lesson

Pass the check. We’ll save the progress.

Answer all 3 questions above and get at least 2 right. You can review the explanations and try again.

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Sources and further reading

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Open Stax: Constrained resources
Source & access notes · checked 2026-10-01

Read unit contribution per scarce resource. This course adds its own whole-unit demand limits and exhaustive small-case comparison.

Access: Public primary page body opened and relevant sections read through the web reader on 2026-10-01; no account required for reading.

Reuse: Original Life Starter cases, datasets and questions; no source exercise or worked dataset reproduced. Links support further reading.

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