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: ['o', 'O', 'H', '7619', '6435', 'X', 'g', '1663']

A: 15717
****
Q: ['f', 'N', '8597', 't', 'K', '9755', 'j', '9747', '7259', '5493', 'n', '7269', '8493', '2279', '5369', 'f']

A: 64261
****
Q: ['m', '5469', 'M', '6463', 'F', 'i', 't', '5169', 'a', 'I', '8971', 'g', 'E', '1687']

A:
27759
****