Financial Literacy: Plans, Budgets, and Making Change

The situation: the trip costs $340 (bus$180, admission $120, snacks$40). The class treasury holds $95, and a bake sale is planned.

Step 1: Total the expenses and verify: 180 + 120 + 40 = $340 ✓ (line items must sum to the total — audit habit #1).

Step 2: Compute the funding gap: 340 − 95 = $245 needed from the bake sale.

Step 3: Translate the gap into bake-sale reality: cupcakes sell at $2 each → 245 ÷ 2 = 122.5 → must sell 123 cupcakes (round UP — 122 leaves you 50¢ short; the remainder's story strikes again).

Step 4: Add the planner's buffer: aiming for exactly 123 means one rainy-day no-show sinks the trip. Plan for 140 (≈15% cushion) and state the cushion as a decision.

Step 5: The debrief vocabulary: income (treasury + sales), expenses (the $340), balanced budget (income ≥ expenses). One page of arithmetic; every adult-life budget has exactly this skeleton.

The shelf: Brand X — 1 L for $2.40. Brand Y — 1.5 L for$3.30. Brand Z — 2 L for $4.80 with a "25% more free!" sticker (the 2 L INCLUDES the bonus).

Step 1: Unit prices per litre: X → 2.40 ÷ 1 = $2.40. Y → 3.30 ÷ 1.5 =$2.20. Z → 4.80 ÷ 2 = $2.40.

Step 2: Verdict on pure value: Y wins at $2.20/L. The flashy "free!" sticker on Z only brought it down to a TIE with plain X — stickers advertise the deal; division reveals it.

Step 3: The fit questions before buying: need only 1 L for the recipe and juice spoils? X's smaller bottle may waste less. Hosting a party needing 3 L? Two Y bottles (3 L, $6.60) vs Y+Z mixes… cheapest 3 L is two Ys at$6.60 (vs X×3 = $7.20, Z+X =$7.20).

Step 4: The habit, compressed to a slogan: PRICE tells you what you pay; UNIT price tells you what you get. Compute the second before trusting the first.

Exit: invent a deal-sticker for the WORST buy that would tempt a non-calculator. (Marketing is the adversary; arithmetic is the armour.)

The bike costs $180. Plan A: save$15 weekly allowance until you can buy it. Plan B: borrow from your sister today, repay $15 weekly PLUS a flat$24 "thanks fee."

Step 1: Plan A timeline: 180 ÷ 15 = 12 weeks of waiting, total paid $180.

Step 2: Plan B ledger: bike today, repay 180 + 24 = $204 → 204 ÷ 15 = 13.6 → 14 weeks of payments (the last one small), total paid$204.

Step 3: Face the trade squarely: Plan B costs $24 EXTRA — that's the price of "now." Plan A costs 12 weeks of WAITING — the price of "free." Neither plan is dumb; they price different things (money vs time-with-bike).

Step 4: Situational judgment: bike needed for a paper route earning $20/week? Borrowing PAYS ($20 × 12 weeks of earnings dwarfs the $24 fee). Bike is a summer toy and it's March? Save. The numbers don't decide alone — the USE of the thing does.

Step 5: Name the grown-up word: the $24 is INTEREST — money's rental fee. Every loan in their future is this bike problem wearing bigger numbers. Exit: at what weekly "thanks fee"… flat fee, rather — would borrowing stop being worth it for the paper-route kid? (Above$240 = the route's 12-week earnings.)