The first three bills, which totaled $122.3 million, have been paid by BP, according to the government.
BP has sent bills to both Anadarko and Mitsui for their shares -- 25 percent and 10 percent, respectively -- of the response costs. Anadarko has refused to pay BP the $272 million bill, saying BP caused the spill through misconduct or negligence and therefore has sole responsibility. Mitsui, billed $111 million, has also reportedly refused to pay.
BP is paying directly for some response efforts, including the drilling of relief wells, and reimbursing the federal government for its costs.