399091/497 - 2800(76200-75814)/1930 =803.8217304500805 - 2800(386)/1930 =803.8217304500805 - 560 =-256.1782695499195
399091/497 - 2800(76200-75814)/1930 =
803.8217304500805 - 2800(386)/1930 =
803.8217304500805 - 560 =
-256.1782695499195