Group hashes by keys and sum the values

Question

I have an array of hashes:

[{\"Vegetable\"=>10}, {\"Vegetable\"=>5}, {\"Dry Goods\"=>3>}, {\"Dry Goods\"=>2}]

I need to use

Answer 1

If have two hashes with multiple keys:

h1 = { "Vegetable" => 10, "Dry Goods" => 2 }
h2 = { "Dry Goods" => 3, "Vegetable" => 5 }
details = {}
(h1.keys | h2.keys).each do |key|
  details[key] = h1[key].to_i + h2[key].to_i
end
details