Playtex bra maker and apparel giant Sara Lee Corp on Thursday posted a 42 per cent year-on-year jump in first quarter earnings per share on the back of a strong performance from its intimates underwear business. The Chicago-based consumer goods goliath said earnings per share soared to 37 cents from 26 cents in the quarter with sales up seven per cent to $4.5 billion from $4.2bn in the year-ago period, with operating income up 25 per cent.