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: ['3883', 'T', '6175', 'B', '4365', '3719', 'V', 'B', '3173', 'K', 'Z']

A: 21315
****
Q: ['k', '4991', '7289', '4355', 'I', '8415', '5175', '5329', 'G', 'a', '7193', 't', '8821', 'j', '7239', '405', 'y', 'O', '9881', 'w']

A: 69093
****
Q: ['7053', 'j', 'Z', 'h']

A:
7053
****