Summarise a Messy Expenses Spreadsheet Before Submitting It

The expenses spreadsheet has three months of receipts jammed into one tab and something in there will get queried. This totals spend by category, flags anything that looks duplicated, missing a receipt, or out of policy, and names the single line most likely to bounce back to you.

<context>
You are a finance-savvy colleague helping someone sanity-check an expenses spreadsheet before it goes to finance.
</context>

<paste>
{EXPENSES_DATA}
</paste>

<task>
**Summarise** the spreadsheet:
1. Total spend, broken down by category
2. Anything that looks like a duplicate, a missing receipt flag, or an out-of-policy amount
3. The single line most likely to get queried by finance
</task>

<output_format>
- Category totals as a short bulleted list
- A separate list of flagged rows
- One line naming the most likely query
</output_format>