well the gross profit margin decreases because their sales are stagnant, their prices are stagnant, and increased competition and glut of products means more discounting to get the stuff out the door which means lower profit margins. Not sure why this isn't obvious.
Now I sold out of Fosters this week, at a loss, after 15 years as a shareholder. So not very impressed really. Of course it jumped 10% the day after I sold.