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.
['F', 'z', 'T', '5817', '1831', 'Y', '4727', '5105', '2325', 'W', '3355', 'b', '2859', '7709', '5621']