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.
['2629', '2425', 'a', 'D', 'P', 'f', 'A', '4971', '7309', 'g', 'Z', '7957', '7321']