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: ['w', '7301', '9411', 'z', 'g', 'X', '1045', 'l', 'F', 'M', 'R', '7957', 'e', '5145']

A: 30859
****
Q: ['9905', 'm', 'Q', 'S', 'T', '7821', '1773', '9515', '3963', '2931', '7023', '8677', '1739', 'O', '909', '9153', '8319', 'k', '2851']

A: 74579
****
Q: ['S', 'r', '9143', 'X', '4789', 'x', 'e', 'Z', 't', '4007', '8539', 'l', 'I', '4371', 'x', 'b', 'v', 'z']

A:
30849
****