Week 10 Lecture: Basic Adulting 101

Why naming categories matters, a real grocery list, and what Assignment 3's budget section wants

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Introduction#

The fridge’s third and final appearance: price out what’s actually in it against what a week of groceries should cost. Budgeting failure is rarely about income — usually about the absence of named categories. Today’s scope is basic budget categorisation, grocery planning, cooking, and a cleaning schedule, the most transferable topic in the course beyond graduation.

Definitions#

Budget (noun)

a named allocation of money to specific categories, prepared in advance of spending, not reconstructed afterward from bank statements.

Grocery list (noun)

a written record of food to purchase, prepared before entering a supermarket, not while standing in it.

Body#

• Why naming categories matters. Warren, E., & Warren Tyagi, A. (2005) popularised the 50/30/20 rule: 50% of after-tax income to needs, 30% to wants, 20% to savings or debt — three named categories rather than an unstructured sense of caution.

Check-in: If your weekly budget is $200, what does 50/30/20 look like in actual dollars?

• The fridge, priced out. Its contents, set against a real, planned weekly grocery list, show the gap between what’s in the fridge and what a week actually costs to run properly.

Check-in: Roughly how much would it cost to replace the fridge's actual contents with one week of planned groceries?

• Cooking a complete meal, in order. Pick one protein, one starch, one vegetable — that’s a complete meal, not three separate decisions. Cook in order of how long each takes: the slowest item goes on first, the fastest goes on last, so everything finishes within a few minutes of each other. Taste before declaring it done; a recipe’s stated time is a starting guess, not a guarantee.

Check-in: If rice takes 20 minutes and a fried egg takes 3, which goes on the stove first?

• A cleaning schedule that actually recurs. The same model as Week 2’s laundry schedule: name each recurring task — bins, floors, bathroom, surfaces — and give each a fixed day or interval, not “when it looks dirty.” A schedule catches a task before it’s visible; waiting for visible means it’s already overdue.

Check-in: Which of your own recurring cleaning tasks currently has no fixed day attached to it?

• What Assignment 3’s budget section actually wants. Two marked criteria: Budget (10%) marks category coverage and plausibility against your stated income; Grocery logistics (8%) marks a one-week grocery list against an explicit grocery budget, plausible against real prices, with a standing schedule for when recurring items run out. Neither rewards a bigger number — both reward a number that survives contact with a real week.

Check-in: Between Budget and Grocery logistics, which one is actually marking whether your numbers are realistic against real prices?

In-lecture activity#

Conclusion#

Categories, not totals, make a budget work — the clearest lifetime payoff of any topic in this course. You now have a real, priced grocery list template, a named-category method, a meal you can actually cook in order, and a cleaning schedule with a fixed day for every task. Coming up: this week’s lab (budget triage and the grocery list).

This week’s reflection, due 12:00 Tuesday of week 11: itemise one of your own recent orders or shopping trips, and name the point where you always end up ordering at the last minute.