In N.L.R.B. v. Brown Root, Inc., 311 F.2d 447, 454 (C.A. 8), it is said that "in a back pay proceeding the burden is upon the General Counsel to show the gross amounts of back pay due.
In J.H. Rutter Rex Manufacturing Co., Inc. v. NLRB, 473 F.2d 223 (5th Cir. 1973), a group of claimants had worked at lower paying jobs following their unlawful discharges.