A stall paid a non-refundable £90 permit fee. It owns a tool it could sell for £50 and would need £20 of new supplies to continue. Which amount is sunk?

• The £50 available from selling the tool
• The £90 already paid for the permit
• The £20 needed for the next supplies

Which plan gives a clear result and date for reviewing whether to stop?

• Review after six weeks if paid orders are below 12
• Review sometime later if the project feels difficult
• Review after more spending if success still feels close

A project that closes cannot leave useful records or skills.

During six stall hours, you could instead take a £45 shift or earn £30 tutoring. You can do only one, both are available, and you value their other benefits equally. What is the money opportunity cost of choosing the stall?

• £75 from adding both alternative jobs together
• £45 from the best available alternative job
• £30 from the lower-paying alternative job

A founder has spent £600 that cannot be recovered. Continuing next week would bring £80 revenue and £120 new costs; stopping adds no cost. No other benefits or costs differ. Which choice leaves more money?

• Continue because it recovers all £600 already spent
• Continue because £80 revenue covers £120 new costs
• Stop because it avoids a further £40 loss

For one month, operating brings £500 revenue and £300 avoidable costs. Another £260 is payable whether you operate or pause. No other costs, benefits or alternatives differ. Which option loses less?

• Operate: lose £60 rather than £260
• Pause: lose nothing because sales stop
• Either: lose £260 under both choices

A venture is closing. Which plan keeps useful learning and handles responsibilities?

• Keep the test records and plan payments owed
• Keep the tools but ignore every unpaid bill
• Delete all records and promise automatic success next time

A founder plans to stop if fewer than 20 paid orders arrive in four weeks. At the review there are 8 orders and no new evidence for changing the plan. Which action follows the rule?

• Extend the deadline because earlier effort deserves repayment
• Spend more on the same plan to justify the earlier expense
• Stop the venture and plan how to meet its remaining obligations