The contracted residential surcharge is $4.15 per eligible shipment. 3,210 affected lines were billed at $11.68, producing a deterministic variance of $24,180.30.
Invoiced amount$142,870
−
Expected amount$118,690
=
Variance detected$24,180
Rule: logistics.residential-surcharge.v33,210 eligible shipments × ($11.68 billed − $4.15 contracted) = $24,171.30, plus $9.00 in duplicate line variance.
Relevant contract clause“Residential delivery surcharge shall not exceed $4.15 per shipment for qualifying service levels during the agreement term.”Parcel Services Agreement 2026 · Section 4.2 · Residential Delivery Surcharge