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: ['e', 'K', 'A', 'V', '1169', 'n', '8729', 'V']

A: 9898
****
Q: ['L', 'm', '1769', 'p', 'k', 'U', '1481', 't', 'u', 'a', 'i', 'd', '2943', 'C']

A:
6193
****