◆ Excel formula fix · $25 per formula
One Excel formula giving the wrong answer? Fixed for $25.
Send the formula as plain text and tell me what it should do. You get back a corrected formula and a short explanation of what changed, so you can check it in your own copy. SUMIF/SUMIFS, VLOOKUP/XLOOKUP, IF, and COUNTIF.
◆ What it covers
The formulas that quietly go wrong.
A range that stops one row short, a lookup that returns #N/A, an IF that never hits the right branch. One formula, one fix, one flat price.
SUMIF / SUMIFS
Category or date totals that come up short or double-count: ranges that miss rows, criteria that don't match.
- Ranges
- Criteria
VLOOKUP / XLOOKUP
Lookups returning #N/A or the wrong row: column index, exact vs. approximate match, and unlocked references.
- #N/A
- Match type
IF
Conditions that land on the wrong result, including nested IFs that have grown hard to read.
- Logic
- Nested IFs
COUNTIF
Counts that are off because of the range, the criterion, or text that looks like a number.
- Ranges
- Criteria
◆ Illustrative example
The difference is one row.
An invented expense sheet totals the Office category. The formula in E2 stops at row 8, so the last Office amount never gets counted.
| Row | A · Category | B · Amount |
|---|---|---|
| 2 | Office | 18.00 |
| 3 | Travel | 30.00 |
| 4 | Office | 12.50 |
| 5 | Tools | 20.00 |
| 6 | office | 4.50 |
| 7 | Travel | 7.00 |
| 8 | Office | 5.00 |
| 9 | Office | 10.00 |
Criterion in D2: Office
=SUMIF($A$2:$A$8,$D$2,$B$2:$B$8)
Result 40.00
=SUMIF($A$2:$A$9,$D$2,$B$2:$B$9)
Result 50.00
What changed: both ranges now end at row 9, so the final Office amount (10.00) is included. The lowercase “office” in row 6 counts too, because SUMIF doesn’t care about letter case. Illustrative example with invented data; formulas use English function names and comma separators.
◆ How it works
Small job, clear steps.
Send the formula
Paste the current formula as plain text, say what it should do and the result you expect. Invented or sample numbers are fine.
Confirm the quote
I check that it fits, then confirm the $25 quote and when you'll have it. Nothing is owed until you say yes.
Get the fix
You receive the corrected formula and a short explanation. Try it in a copy of your workbook and confirm the result.
◆ Fine print
Short version.
- One formula per $25. Fixes to an existing formula only. Workbook rebuilds, data cleanup, macros, and automation are separate work.
- No credentials, no live workbook. Send the formula as text. Never send passwords, account access, or real customer records.
- AI-assisted, then reviewed. Drafting uses AI tools, and a person reviews every fix before it goes out.
- Quote before payment. Scope, price, and delivery time are confirmed before you pay anything.
- Paying. Payment details (Venmo Business) are sent privately after you confirm the quote.
◆ Send your formula
Tell me what it should do.
This form only starts the conversation. Nothing is charged until you've seen and confirmed the quote.
Paste the formula as text. No files or screenshots needed, and please leave out passwords and real customer data.
Prefer email? mike@cottonwoodtechservices.com · (541) 219-1626