notes/logseq/bak/analysis/price_mix_vol/2023-01-13T01_15_47.843Z.Desktop.md

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Only applies to items that exist in both sets of data

Change in Price

( P₂ - P₁ ) Q₂

Change in Quantity

( Q₂ - Q₁ ) P₁

To further break out change in quantity

Change in Quantity - Volume Related

Q₂ ( Q₁ / Σ ( Q₁ ) ) - Q₁

Change in Quantity - Mix Related

Q₂ - Q₂ ( Q₁ / Σ ( Q₁ ) )