Lowe's on Tuesday cut its full-year forecast, as the home improvement retailer's quarterly sales declined and it said it expects spending on do-it-yourself projects to weaken.The company said it now expects total sales of between $82.7 to $83.2 billion for the full year, compared with the $84 billion to $85 billion that it previously expected. It said it expects comparable sales to fall by 3.5% to 4%, compared to its prior forecast of a decline of 2% to 3%. It anticipates adjusted earnings per share will be ...