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: ['s', 't', 'W', '163', 'v']

A: 163
****
Q: ['b', '5447', 'R', '8489', 'L', '627', 'P', '7491', 'c', 'c', 'r', '6923', '1167']

A: 30144
****
Q: ['R', 'k', '3355', 'Y', '6635', 'M', '4839', 'T', 'd', '495', 'g', 'E', 'g', 'F', 'S', '5377', 'g']

A:
20701
****