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: ['k', '6555', 'L', '7549', 'W', 'y', 'y', '8817', 'J', 't', 'X', 'M', 'N', 'G', '7441', '283']

A: 30645
****
Q: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

A: 19833
****
Q: ['f', '1731', '6077', '5379', 'C', '9081', 'y', '5137', 'u', 'B', '3891', 'B', 'C', '1523', '5505', 'N', '325']

A:
38649
****