Step 1 / 5Prepare the original worksheet-anchored controls
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Restore the original 80/20 grid and three original anchors while keeping source records. These working panels belong to the actual Source worksheet. Teaching is read-only; switch to Your turn to edit.
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Inspect the editable formula copy
A:F retains every source row. G:K checks inclusion with one field omitted in each availability mask. M:P stores selections and row 53 stores All flags. T2:T5 calculates count, sum, mean and the complete source sum. Item counts and a FILTER spill appear below row 60.
Editing this copy stays local. Its fixed source ranges and label lists do not add newly typed categories to the website. Rebuild from the report after changing source labels or connections.