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.
['X', '2259', 'm', 'n', '5493', 'M', 'c', '2173', 'n', 'k', 'D', 'X', '5433', 'K', 'a', '9621', 'u']