us foods holding corp shares usfd slid 28 in premarket trade thursday after the food service company posted a loss for the first quarter and offered guidance that lagged estimates the company posted a net loss of 16 million or 7 cents a share for the quarter after a loss of 39 million or 18 cents a share in the yearearlier period adjusted pershare earnings came to 36 cents ahead of the 22 cent factset consensus sales rose to 7798 billion from 6295 billion a year ago also ahead of the 7479 billion factset consensus sales were driven by higher total case volume and food cost inflation of 173 compared to the yearearlier period the company said in a statement operating costs rose 191 to 12 billion due to greater volume and higher distribution costs in part due to higher temporary labor costs and higher than normal wage inflation those were partially offset by cost savings elsewhere the company said it is backing guidance offered in february for fullyear adjusted eps of 180210 compared with a factset consensus of 226 shares have fallen 25 in the year to date while the sp 500 spx has fallen 17