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.

Q: ['s', 't', 'W', '163', 'v']

A: 163
****
Q: ['4701', 'b', 'i', 'B', 'z', '7837', 'W']

A: 12538
****
Q: ['9791', '6277', 'b', 'X', '7483', '7917', '5801']

A:
37269
****