Shelf availability — Exact row deduplication + Explicit missing-value fill: Exact row deduplication + Explicit missing-value fill for supplied shelf availability records (available_units, shelf_capacity). Up to 200 rows; 2 independent reports using shared local analytical engines. No live lookup, prediction, professional assessment or external action. 0.01 USDC includes 2 supplied-data reports for up to 200 rows.