In this task, you are given an input list. A list contains several comma-separated items written within brackets. You need to return the count of all the numerical elements in the given list. Return 0 if no numerical element in the list.
['6423', '661', 'z', '5549', '4983', 'Z', 'Q', '1123', 'D', 't', 'Z', 'd', 'Z', '5433', 'Q', 'u', '8405', '1383', '6237']