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: ['R', 'C', 'S', 'x', '1529', 'r']

A: 1529
****
Q: ['3895', 's', 'j', '7755', 'H', '7941', '4903', 's', '3629', '1183', '1001', '5569', 'q', '4735']

A: 40611
****
Q: ['Q', '9343', 'e', 'M', 'h', '4665', '1489', 'O', '4061', '5515', 'E', 't', 'q', '9085', 'e']

A:
34158
****