Examples
Examples
Try the starting example
- Opening available cash ($)
- 500
- Events: name, date, cash change $ (+receipt, -payment)
- New deposit,2026-10-20,-2000 Movers,2026-10-22,-500 Old deposit refund,2026-11-01,1500
- Cash after each event ($)
- 2026-10-20 New deposit: -1500; 2026-10-22 Movers: -2000; 2026-11-01 Old deposit refund: -500
- Lowest cash balance ($)
- -$2,000.00
- Extra opening cash required to avoid a shortfall ($)
- $2,000.00
- Closing cash balance ($)
- -$500.00
Try another scenario
- Opening available cash ($)
- 2500
- Events: name, date, cash change $ (+receipt, -payment)
- New deposit,2026-10-20,-2000 Movers,2026-10-22,-500 Old deposit refund,2026-11-01,1500
- Cash after each event ($)
- 2026-10-20 New deposit: 500; 2026-10-22 Movers: 0; 2026-11-01 Old deposit refund: 1500
- Lowest cash balance ($)
- $0.00
- Extra opening cash required to avoid a shortfall ($)
- $0.00
- Closing cash balance ($)
- $1,500.00
Calculation method
Calculation method
Cash after each event ($)
Sort events by date, retaining input order for same-day events, then accumulate signed cash changes.
Lowest cash balance ($)
Minimum of the opening balance and each event balance.
Extra opening cash required to avoid a shortfall ($)
max(0, −minimum balance).
Closing cash balance ($)
Opening balance + all signed event changes.
Symbols and units
- a
- Opening available cash ($)
- b
- Events: name, date, cash change $ (+receipt, -payment)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- A dated supplied-cash-flow scenario. Refund dates and amounts are assumptions, not guaranteed funds. Same-day ordering follows input order so it can expose a shortfall before a later same-day receipt.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.