prorate

v. divide or calculate proportionately

Verb
1. make a proportional settlement or distribution
(hypernym) settle
(derivation) proration
2. divide or assess proportionally; "The rent was prorated for the rest of the month"
(hypernym) calculate, cipher, cypher, compute, work out, reckon, figure
(derivation) proration

(v. t.)
To divide or distribute proportionally; to assess pro rata.
  

A quantity provision in a fruit or vegetable marketing order that is intended to even out weekly shipments (or shipments for some other specified periods of time); it aims to prevent too much of the regulated commodity from entering the commercial market at the same time and thereby depressing prices.
  

Synonyms and related words:
ask, assess, charge, charge for, demand, divide, divvy, exact, impose, levy, make dutiable, parcel, portion, pro rata, proportion, proportionate, quota, ration, require, share, shift, stick for, tax, tithe