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:
['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']

Ex Output:
36242


Ex Input:
['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']

Ex Output:
17914


Ex Input:
['s', '5351', '7871', 'I', '869', '3775', 'N', 'v', 'i']

Ex Output:

17866