 Shares of Lumber Liquidators Holdings Inc. soared 11 in premarket trading Monday, after the wood-flooring seller reported third-quarter profit and sales that rose well above expectations, as an increased willingness of customers to allow contractors into their homes amid the pandemic for installation and home improvement projects helped boost demand. Net income rose to 15.5 million, or 53 cents a share, from 1.05 million, or 4 cents a share, in the year-ago period. 