If you've been wrestling with XLOOKUP, nested formulas, and INDEX MATCH only to hit a wall, the problem isn't your effort. It's the tool. What you're describing, matching inventory totals across horizontal and vertical layouts, by item and by date, with data pulled from multiple sheets, is exactly the kind of task that traditional spreadsheets were never built to handle gracefully. You've run into a structural limitation, not a skill gap. And that distinction matters.
Your setup is smart: you're tracking daily in/out counts, building a running total, and then cross-referencing that against a third-party report. The logic is sound. The friction comes from the fact that your source data lives in one orientation (vertical rows of daily transactions) while your comparison table expects it in another (horizontal columns by date). Classic spreadsheet tools force you to contort formulas into multi-criteria lookups that break as soon as your data shifts or grows. You're not alone in this, countless inventory managers, analysts, and operations leads spend hours debugging these mismatches instead of reconciling the numbers.
You don't need a better formula. You need a better approach. An AI-native spreadsheet can understand the relationship between your data sets without you having to manually map every cell reference. Instead of writing a formula that says "find this item, on this date, in this range, and return that total," you can simply ask it to match your inventory totals to the double-check column by item and date, regardless of whether the source is horizontal or vertical. The system interprets the structure, handles the cross-referencing, and gives you the result. That's not magic. It's what happens when the tool understands context, not just coordinates.
The practical takeaway is this: if you're spending more time debugging lookup formulas than analyzing whether your inventory matches, it's worth exploring a spreadsheet that treats your data as relationships, not grid cells. You've already done the hard part, building the logic and knowing what needs to match. Let the technology handle the alignment. Your job is to verify the numbers, not to wrestle them into place.