discussed Cited "see, e.g." Marvin v. Hodgson Belo Corp. (1942), 316 U.S. 624, 631 [ 62 S.Ct. 1223, 1227 , 86 L.Ed. 1716 ].) In the Belo case, where “the purpose of respondent’s arrangement with its employees was to permit as far as possible the payment of the same total weekly wage after the Act as before” by agreeing with the employees upon a new and lower “regular rate” of hourly pay, that court further established that “nothing in the Act bars an employer from contracting with his employees to pay them the same wages that they received previously, so long as the new rate equals or exceeds the minimum [40 cents an hour, § …