ref: 6630895daf020374ab3e708b61036b94eb7a5962
parent: 9921b55b22df4e2e1053395844903d9f4800014e
author: Daniel Kang <ddkang@google.com>
date: Mon Aug 6 08:15:24 EDT 2012
Combine cost_coeffs functions. Change-Id: I3421d07fdcf2148d75c8dbfc8c44bc2d96a3a8f6