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: ['z', 'U', '6817', 's', '3731', 'M', 'I', '1095', 'l', '5993', '5207', 'e', 'L', '5361', 'v', 'g', '1963', '4829', '9541', '8261']

A: 52798
****
Q: ['6731', 'f', '4561', '5601', 'i']

A: 16893
****
Q: ['m', 'm', 'F']

A:
0
****