Get sum of values from an Array of objects - Ruby : I have a data structure in ruby as below:

    [["N1-Alb",
      {Sun, 05 Feb 2017=>"",
       Mon, 06 Feb 2017=>"",
       Tue, 07 Feb 2017=>"",
       Wed, 08 Feb 2017=>"0.25",
       Thu, 09 Feb 2017=>"0.03",
       Fri, 10 Feb 2017=>"",
       Sat, 11 Feb 2017=>""}],
     ["N1-Cet",
      {Sun, 05 Feb 2017=>"",
       Mon, 06 Feb 2017=>"7.8",
       Tue, 07 Feb 2017=>"",
       Wed, 08 Feb 2017=>"0.00",
       Thu, 09 Feb 2017=>"",
       Fri, 10 Feb 2017=>"",
       Sat, 11 Feb 2017=>""}],
     ["N3-Tju",
      {Sun, 05 Feb 2017=>"",
       Mon, 06 Feb 2017=>"",
       Tue, 07 Feb 2017=>"",
       Wed, 08 Feb 2017=>"3.15",
       Thu, 09 Feb 2017=>"",
       Fri, 10 Feb 2017=>"8.0",
       Sat, 11 Feb 2017=>""}],
     ["N7-Mlp",
      {Sun, 05 Feb 2017=>"",
       Mon, 06 Feb 2017=>"",
       Tue, 07 Feb 2017=>"5.01",
       Wed, 08 Feb 2017=>"0.03",
       Thu, 09 Feb 2017=>"",
       Fri, 10 Feb 2017=>"",
       Sat, 11 Feb 2017=>"4"}]]

How can I get sum for All Sundays, Mondays etc. up to Saturdays separately in to a Hash or an Array format?

The Final Hash should be:

    result = { sun: '0', 
               mon: '7.8', 
               tue: '5.01', 
               wed: '3.43', 
               thu: '0.03', 
               fri: '8.0', 
               sat: '4' }

