break down those numbers, our senior research analyst at susquehanna and david schwartz an analyst at morningstar. sam i'll turn to you gross margin is up 20 basis points to 44%. >> they did say there would be more margin pressure in the quarter slightly more than they anticipated. your first conversation about china sounds like china of better than people thought they were expecting a little bit of decel >> david here, they talk about average selling price increase as well as expansion but higher product cost due primarily to those north american tariffs does that surprise you did you work that through in your model? >> i think that's a very good number my number was at 44.1% 44.0 is close. i think they had some one time issues in the quarter including the tariffs and possibly the demonstrations in hong kong and other issues in china that may have had a small impact on the grors mar gross margin >> overall clearly everything is still going very right for this company. is there a question just to where the stock had got to and the valuation? is that why it's slipping? >> it's slipping a little bi