# Fixed Variable Cost Misclassification Check

Review mixed costs treated as pure fixed or pure variable before a model runs on them.

## Scope
Preparation and review only. No account action or professional decision.

## Inputs
Cost list with behaviour notes and activity levels for two periods.

## Workflow
1. Record each cost’s documented behaviour.
2. Compare cost totals against activity change across periods.
3. Flag costs that moved with activity but are modelled as fixed, or vice versa.
4. Return the misclassification list without reclassifying.

## Output contract
cost | modelled_behaviour | activity_change | cost_change | suspected_mixed | model_unproved

## Fictional acceptance test
Fictional support cost modelled fixed at 2,000 rises to 2,300 when volume rises 50%. Treating it as fixed understates cost at higher volumes; it behaves as mixed.

## Review gates
Keep original values, source IDs and version dates. Unknown facts stay held. Use qualified review for hiring, legal and accounting conclusions. No send, share, sign-in, scheduling, ledger change or payment. Fictional contract review is not a live account compatibility test.

## Method source
https://corporatefinanceinstitute.com/resources/accounting/fixed-and-variable-costs/

Checked October 18, 2026. Oct17 live AIS Search Console (sc-domain property, tej@groweasy.ai, Saturday audit): Oct 9-15 complete week 22 clicks, 937 impressions, 2.3% CTR, position 10.6, day-row verified. Top queries: Muse India 125i (3-month), Planable/Claude social agent 45i, marketing Copilot 37i, Planable/ChatGPT 24i, investor agents 19i, Copilot investment-committee 14i, cash flow forecasting 13i, campaign brief 12i. Google Trends verified Oct 17: muse glimmer/spark rising. Site impressions are query leads, not monthly volumes; exact topic volume is unmeasured.