The Detective’s DeskMarek Bell
Cashier
“The purchase total was thirteen coins.”
EASY · CASE FILE
The empty till
Easy · ROSE STREET CAFÉ
The café is checking three statements about a single cash sale. No tip, fee or discount applied. The receipt records the full price and the amount handed over.
Read the case file below, or open the interactive desk to examine records, keep notes and submit your reasoning. These are the case materials, without the solution.
Your assignment
Whose calculation is incorrect?
- The source records are verified and their stated conditions apply to every account.
- Find the account contradicted by a record. A contradiction alone does not establish wrongdoing.
People and accounts
Nora Finch
Cashier
“The customer handed over twenty coins.”
Lila Wynn
Cashier
“The change due was nine coins.”
Case records
Read each record on its own terms. A claim made by a person is different from a fact established by an independent record.
CASH RECEIPT
A simple sale
The purchase total was 13 coins. The customer paid 20 coins in cash. There were no other charges or payments. Change is the payment minus the purchase total.
This is a verified source record for this case. Compare its stated facts with the exact question.
LOCATION SKETCH
The table plan
The café has six tables and a counter. No payments are recorded on the plan.
The café has six tables and a counter. No payments are recorded on the plan.
DESK RECORD
The cup order
A separate invoice lists a delivery of new cups.
A separate invoice lists a delivery of new cups.
Questions to resolve
How much change should the receipt produce?
Use the interactive case desk to select your finding and cite the records that support it. The answer is checked there, and your progress stays in your browser.
Build your finding
Compare the records with each account. Work out what the evidence establishes, then separate that finding from anything it does not prove.