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:
['Q', '1669']

Ex Output:
1669


Ex Input:
['4159', 'H', 'h', 'W', 'w', 'i', 'G', 'l', 'j', '5467', '9219', 'j', 'q', 'n', '5465', '6197', 'J', 'y']

Ex Output:
30507


Ex Input:
['z', '3267', 'c', '1201', 't', '4509', 'r']

Ex Output:

8977