In this task, you are given an input list A. You need to find all the elements of the list that are numbers and calculate their sum.

['887', '8133', 'X', '2253', '8461', 'I', '5425', 'Z', 'z', 'r']
25159

['2683', '4431']
7114

['S', '3699', 'C', 'b', '3101', 'h', '2309', '8893', 'c', 'D', 'J', '2999', '5733', 'k']

26734