Examples
Examples
Try the starting example
- Gifts: name, amount collected $, amount refunded $
- A,500,0 B,300,100
- Platform fee on original collected gross (%)
- 5
- Fixed fee per positive gift ($)
- 0.3
- Other cash campaign costs ($)
- 100
- Cash prize costs ($)
- 50
- Sponsor cash explicitly offsetting these costs ($)
- 20
- Original collected gifts ($)
- $800.00
- Refunds ($)
- $100.00
- Model platform fees ($)
- $40.60
- Net campaign cash after listed items ($)
- $529.40
- Listed costs less sponsor cash ($)
- $130.00
Try another scenario
- Gifts: name, amount collected $, amount refunded $
- A,500,0 B,300,0
- Platform fee on original collected gross (%)
- 5
- Fixed fee per positive gift ($)
- 0.3
- Other cash campaign costs ($)
- 100
- Cash prize costs ($)
- 50
- Sponsor cash explicitly offsetting these costs ($)
- 20
- Original collected gifts ($)
- $800.00
- Refunds ($)
- $0.00
- Model platform fees ($)
- $40.60
- Net campaign cash after listed items ($)
- $629.40
- Listed costs less sponsor cash ($)
- $130.00
Calculation method
Calculation method
Original collected gifts ($)
Sum original collected gift amounts before refunds.
Refunds ($)
Sum refunds, each limited to that gift’s original amount.
Model platform fees ($)
Round percentage of original gross, then add fixed fee for each positive original gift. Fees are not assumed refunded.
Net campaign cash after listed items ($)
Collected−refunds−platform fees−other costs−cash prize costs+sponsor cash.
Listed costs less sponsor cash ($)
Other costs+prizes−sponsor cash; negative means sponsor cash exceeds these listed costs.
Symbols and units
- a
- Gifts: name, amount collected $, amount refunded $
- b
- Platform fee on original collected gross (%)
- c
- Fixed fee per positive gift ($)
- d
- Other cash campaign costs ($)
- e
- Cash prize costs ($)
- f
- Sponsor cash explicitly offsetting these costs ($)
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 cash campaign reconciliation with explicit fee/refund treatment and sponsor cash. It excludes tax, gift eligibility and noncash donations; it does not publish a fundraising claim.
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
Charity Commission: funds and reserves background; no universal reserve target ↗
Background reading; this does not imply endorsement or independent review of SumFizz.