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: ['901', 'X', 'W', 'D', 'm', 'M', '59', '4855', '6523', 'R', '9781', '8271', '4449', '2221', '8391']

A: 45451
****
Q: ['r', 'z', 'u', 'D', '3449', 'E', 'f', 'w', '1627', '4093', '955', 'i', 's', 'R', 'b', '9773', '2169', 'M', '9305', '4775']

A: 36146
****
Q: ['8341', 'A', 'v', 'p', '7825', 'T', 'y', 'y', 'a', 'm', 'q', 'N', '6499', '6127']

A:
28792
****