Webber Technologies is an emerging manufacturer of 3.5 inch diagonal touch screens for mobile communication devices/media players. 2011 industry sales were reported at 17.59 million units. This number represents an 18.5 % increase over 2010 industry sales. Webber Technologies had a 2010 market share of 5.8 %, compared with a 2011 market share of 4.2%. What was the change in unit sales for Webber Technologies, from 2010 to 2011, attributable to the change in industry sales? Report your answer in individual units.