title: Filtering array with objects inside an object
body: <p>I have a problem with filtering an array with nested objects.</p>
  
  <pre><code>[{
      "firstName": "Kevin",
      "lastName": "Smith",
      "expenses": {
        "drink1": 25,
        "drink2": 20
      }
    },
    {
      "firstName": "John",
      "lastName": "Rambo",
      "expenses": {
        "coffe": 10,
        "cake": 20
      }
    }
  ]
  </code></pre>
  
  <p>I want to get the objects where the sum of all expenses is > 35. How to get inside <code>expenses</code>? Or maybe filter is not a proper way here.</p>