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: ['4425', 'x', '1959', 'C', 'c', 'D', 'M', '8317', 'q', 'x', '4277', 'N', 'z', 'I', '1921', 'o', 't']

A: 20899
****
Q: ['i', 'o', '1321', 'I', 'W', 'e', '1201', 'I', 'e', 'F', '9841', 'm', '9827', 'q', 'f', 'X', '8261']

A: 30451
****
Q: ['T', 'U', 'D', '3139', 'u', 'w', 'Z']

A:
3139
****