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: ['A', '771', 'Q', 'b', '9929', '4991', 'q', '9863', '4363', '5721', 'C', '991', 'j', 'r', 'Q', 'B', 'K']

A: 36629
****
Q: ['3051', '5343', 'k', 'k', '6815', 'E', '4745', 'A', 'A', '1251', '6649', 'f', '4133', 'X']

A: 31987
****
Q: ['B', '7259', '8753', '435', '1369', 'b', 'N', '9755', 'F', 'R', '9401', '3757', '4399', 'L', 'i', 'Z', 'g']

A:
45128
****