Six portions, four dinners
Training 1855 minutescost per portion
A delivered dinner costs $12. Ingredients for 6 portions cost $24. You expect only 4 dinners at home.
Training goal: Count usable portions and time
▶ Play this trainingSituation
1. If all 6 portions are used, what is each one’s cost before other expenses?
- $4 each
- $6 each
- $12 each, like delivery
2. The extra two portions are not stored and are wasted.
- Keep $4 in the comparison
- Assume cooking now costs more than delivery
- The actual dinner cost is $6
3. Suitable storage is available for the remaining portions. Total batch energy adds $2.
- Add $2 energy to every portion
- Total cost for 6 portions is $26
- Store indefinitely to preserve savings
4. Cooking takes time, but no paid work is available during those hours.
- Count time separately without inventing wages
- Subtract any desired hourly rate
- Ignore time entirely
What you will learn
- Waste raises the cost per eaten portion
- Apply energy costs as stated
- Time matters without invented earnings
Your real-life step
Calculate one home-cooked batch using portions actually eaten.
Questions and answers
Is delivery always a bad choice?
No. Time and circumstances may justify the price if it fits your budget.
Is a large batch always cheaper?
Only if the portions are safely stored and used.
How should cooking time be counted?
Separately from cash expenses, except for actual forgone pay.
More trainings in this module
- Efficiency with a price tag
- A pass that goes unused
- Repair buys useful months
- A higher bill, or more use?
- The shift ends after the bus
- A large pack, a small saving
Numbers are illustrative. A game, not financial advice.