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: ['2577', 'B', '3059', 'S', 'l', 'T', 'Q', 'x', 'f', 'l', 'y']

A: 5636
****
Q: ['2787', 'z', '9351', '3339']

A: 15477
****
Q: ['2325', '3259', '1947', '8065', 'H', '2329', 'h', 'l', 'k', 'R']

A:
17925
****