Real situations from working spreadsheets — sales targets, commission tiers, messy exports, aged invoices. Numbered in recommended order: start at 1 and work down, or filter to what you need.
6 exercises — Advanced
Produce a summary line combining count, total and average for one region.
COUNTIF · SUMIF
Diagnose and correct a formula that returns the wrong answer.
IF
Return a readable message instead of #N/A when a lookup finds nothing.
XLOOKUP
Use absolute references so a lookup does not break when copied down a column.
XLOOKUP
Use COUNTIF to reconcile two lists and spot what is absent.
COUNTIF · IF
Combine ranking with a lookup to return a name, not just a number.
LARGE · INDEX · MATCH
| # | Exercise | Functions | Difficulty | Time | Status |
|---|---|---|---|---|---|
| 25 | Build a regional summary from raw ordersHarbor Supply — raw October order export | COUNTIF · SUMIF | Advanced | 16 min | 40 pts |
| 26 | Fix a broken commission formulaHarbor Supply — commission run with a bug | IF | Advanced | 14 min | 40 pts |
| 27 | Handle missing lookups gracefullyHarbor Supply — orders including a new customer | XLOOKUP | Advanced | 10 min | 40 pts |
| 28 | Lock ranges so a lookup survives fill-downHarbor Supply — orders and customer reference | XLOOKUP | Advanced | 12 min | 40 pts |
| 29 | Find which customers are missing from a listHarbor Supply — CRM customers versus billing records | COUNTIF · IF | Advanced | 14 min | 40 pts |
| 30 | Name the second-best rep with LARGE and INDEXHarbor Supply — Q3 sales by rep, unsorted | LARGE · INDEX · MATCH | Advanced | 14 min | 40 pts |