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:
['u', 'i', 'z', 't', '9617', 'd', '3255', 'w', 'S', '3041', '7451']

Ex Output:
23364


Ex Input:
['N', 'O', '2635', '8891']

Ex Output:
11526


Ex Input:
['A', 'I', 'R', 'c', '8849']

Ex Output:

8849