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.
['2891', '6859', '6955', 'R', '3861', 'S', 'U', 'I', 'n', '6861', 'J', '6713', 'P']