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: ['N', 'O', '2635', '8891']

A: 11526
****
Q: ['211', '7561', '8725', '6139', 'I', '6585', '4231', 't', '2983', 'T', 'S', '9569', 'R', 'b', 'N', 'X', '9009']

A: 55013
****
Q: ['8477', 'e', '6439', '6269', '1975', 'Q', 'R', 'k', 't', 'L', 'x', 'w', 'M']

A:
23160
****