Los Angeles County has voted to jack up the prices they pay for everyday items by approving a sales-tax increase — in a move critics say will backfire by sending residents across county lines for shopping trips. Measure ER , which passed by more than 25,000 votes, is set to increase sales taxes by half a cent to raise $1 billion annually for hospitals, local health departments and low-income residents needing insurance. The Los Angeles County Registrar’s Office certified the June 2 primary