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.
['4427', '3721', '6449', 'W', 'z', '7625', '639', '4165', 'V', 'p', '8455', 'f', 'I']