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: ['g', 'A', 'r', '539', '5459', '2725', '7447', '3693', '1757', 'r', 'W', '5949', '4569', '5153', '3985', 'Q', '505', 'M', '8989']

A: 50770
****
Q: ['3071', '355', 'e', '9781', 'R', '6833', 's', '2665', 'L', '9551', 'P', '6101', '2955', '4643', 'O', '3327', '2163', '685', '4277', 'B']

A: 56407
****
Q: ['3549', 'v', '6341', '807', '5603', '4779', 'v', '505', 'Y', 'N', 'u', '1819', '3199', 'y', '2759', 'M', 'I']

A:
29361
****