SEN. Erwin Tulfo has called out some retailers for allegedly defying the price freeze imposed by the Department of Trade and Industry (DTI) amid high prices of basic commodities caused by the oil crisis.The price freeze would be in effect until May 10. Tulfo on Sunday urged the DTI to conduct inspections of groceries and neighborhood stores to ensure strict compliance of its policy.Included in the price freeze are canned sardines, canned meat, c…