By Dan Weil Small business owners are trying to pass on higher inventory, supplies and labor costs to their customers, the NFIB says. Small businesses clearly aren’t escaping inflation. The net percentage of small business owners increasing their prices rose to 61% in January, the highest reading since 1974 and up from 57% in December, according to the National Federation of Independent Businesses. “More small business owners started the new year raising prices in an attempt to pass on higher inventory, supplies, and labor costs,” said NFIB Chief Economist Bill Dunkelberg. “In addition to infl…