An invoice or credit memo match to a purchase order updates the billed quantity on the purchase order without offsetting the invoice price variance for the amount previously billed. Note: The calculation of the invoice price variance follow this formula: (invoice unit price - purchase order line unit price) * invoiced quantity.
A price correction offsets the invoice price variance for the amount previously billed without adjusting the billed quantity on the purchase order.
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What's the difference between performing a price correction and matching to a purchase order?