Show Cost o of Butter 1 Commission Probe WASHINGTON March 13 13 The The tariff commission will begin hearings hearings hearings hear hear- ings April 21 on its inquiry into the tho comparative cost of producing I I butter in the United States and in I I I foreign competing countries The commission has selected I Denmark as the principal com competing pet pet- ing country for tor the purpose of its j Investigation Into foreign costs During the last five years butter imports from Denmark averaged I pounds |