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:
['4463', '489']

Ex Output:
4952


Ex Input:
['D', '1259', '8927', '3345', '553', '7209', '2507', 'l', 'o', '7317', '1227', '6749', 'S', '3171', 'I', '197', '9577', 'j', 'Q']

Ex Output:
52038


Ex Input:
['r', 'U', 'e', 'p', 'q', 'G', 'l', '6773', '1665', '1523']

Ex Output:

9961