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.

Ex Input:
['h', '2335', '2669', '6035', '9901', '7721', 's', '6181', 'C', 'l', 'x', '8275', '1103', 'S', '6447']

Ex Output:
50667


Ex Input:
['E', '9289', 'j', '1847', 'u', 'w', 'z', '4045', '9567', '3133', '2967', 'I', '1927', 'I', 'f', 'T']

Ex Output:
32775


Ex Input:
['3323', '9133', 'F', 'v', '7611', 'I', '6279', 'u', '2923', 'u', '1719', 'S', 'V']

Ex Output:

30988