Calculator and methodology changelog

Substantive changes are documented here instead of changing dates merely to appear fresh.

Version 2026.08.4 — August 5, 2026

• Added conservative cross-field checks for equipment resale and trade-in values.
• Rejected zero-value invoice balances in invoice-cost and collection-priority tools.
• Improved the customer deposit result when protected upfront costs exceed the full customer price.
• Completed a full calculator, link, structured-data and public-content audit.

Version 2026.08.3 — August 5, 2026

• Strengthened negative-margin, return-target, contribution-margin and zero-volume validation.
• Made overdue-invoice materiality relative to average monthly revenue.
• Corrected price-increase, markup, closing-balance, transfer-recovery and float-coverage edge cases.
• Matched cash-flow and equipment results to relevant decision guides.
• Added machine-readable field limits and sample defaults to calculator structured data.

Version 2026.08.2 — August 5, 2026

• Expanded Jackie McCauley’s author profile and first-hand operating background.
• Published five original operator field notes.
• Added ten flagship diagrams and strengthened social-sharing metadata.
• Clarified crawler access, evidence boundaries and editorial accountability.

Version 2026.08.1 — August 4, 2026

• Added cross-category related-calculator links to all 30 calculators.
• Added page-specific revision notes, methodology, worked examples and source references.
• Added llms.txt, llms-full.txt, evidence and corrections pages.

Maintenance rule: A page date changes only when its formula, validation, sources, material explanation or structured data receives a substantive update.