Okla. Stat. tit. 13, § 13-117: Apportionment according to distance

If a consignee voluntarily receives freight at a place short of

the one appointed for delivery, the carrier is entitled to a just

proportion of the freightage, according to distance. If the

carrier, being ready and willing, offers to complete the transit, he

is entitled to the full freightage. If he does not thus offer

completion, and the consignee receives the freight only from

necessity, the carrier is not entitled to any freightage.