# Twenty optional context swaps · learner copy

Use any one or two **after** the core lesson. Days 25 and 30 swaps are for after first check collection. All amounts, rates, roles, companies and settings are made up; no personal data or real quote. For every prompt, show the rate/base, operation, units, a check and one missing real condition. These are extra practice, not extra required curriculum periods; the [worked swaps key](teacher/KEY-AND-NEXT.md#twenty-optional-swap-results) is public and teacher-targeted.

## Day 21 · two bands

- **Film-set rehearsal:** 6 regular paid hours at $25/hour and 3 additional paid hours at 1.5× the base rate. Find the two amounts and total.
- **Museum install:** 4 regular paid hours at $30/hour and 1 additional paid hour at 2× the base rate. Find the total; explain where the multiplier applies.

## Day 22 · allowance once

- **Audio rehearsal:** 5 regular paid hours at $26/hour, 2 additional paid hours at 1.25× base rate, and a $15 once-only model allowance. Find gross model total.
- **Festival build:** 7 regular paid hours at $24/hour, 1 additional paid hour at 1.5× base rate, and $12 once-only allowance. Find gross model total.

## Day 23 · cost base

- **Badge print:** fictional unit cost $48, mark-up 25% on cost. Find dollar gap and stated selling price.
- **Prop repair:** fictional unit cost $35, mark-up 20% on cost. Find dollar gap and stated selling price.

## Day 24 · two bases

- **Zine print:** model cost $40 and selling price $50. Find price gap, mark-up on cost and margin on selling price.
- **Workshop kit:** model cost $90 and selling price $108. Find the same three outputs; round a repeating percentage to two decimal places.

## Day 25 · after-check only

- **Exhibition label:** model cost $60, selling price $75. Find price gap, mark-up and margin.
- **Scene build:** 3 regular paid hours at $20/hour and 1 additional paid hour at 1.5× the base rate. Find gross model total.

## Day 26 · forward and return

- **Imaginary ticket card:** model figure goes from $40 to $50 then returns to $40. Find dollar changes, forward percentage increase and return percentage decrease.
- **Fictional materials bag:** model figure goes from $75 to $90 then returns to $75. Find the same and round the return percentage to two decimals.

## Day 27 · stipulated rates

- **Travel-plan exercise:** pretend AUD1 = USD0.75 with no fee. Convert AUD100 to USD and, separately, USD45 to AUD.
- **Digital-rights exercise:** pretend AUD1 = USD0.60 with no fee. Convert AUD180 to USD and, separately, USD72 to AUD.

## Day 28 · dividend and yield

- **Imaginary library-share company:** 25 shares, price $20/share, annual dividend $0.40/share. Find annual dividend dollars and yield.
- **Imaginary garden-share company:** 80 shares, price $16/share, annual dividend $0.64/share. Find annual dividend dollars and yield.

## Day 29 · price to earnings

- **Fictional press A:** share price $28, annual earnings per share $4. Find P/E and reverse check.
- **Fictional studio B:** share price $45, annual earnings per share $3. Find P/E and reverse check. Can the ratios alone recommend one company?

## Day 30 · after-check only

- **Made-up ticket conversion:** pretend AUD1 = USD0.80 with no fee. Convert AUD90 to USD and USD64 to AUD.
- **Imaginary publisher:** 12 shares at $25/share, annual dividend $0.50/share, annual earnings per share $5. Find model annual dividend dollars, dividend yield and P/E.