Webber Technologies is an emerging manufacturer of 3.5 inch diagonal touch screens

| March 29, 2017

Question
I can t figure out how they found this answer

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 17.61 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 4.1 %. What was change in unit sales for Webber Technologies, from 2010 to 2011, attributable to its change in market share? Report your answer in individual units. Answer:
(-299,370) (units)

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