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: ['7669', '3367', 'A', 'Z', '6173', '4391', 'f', 'S', '9657', '2631']

A: 33888
****
Q: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

A: 19833
****
Q: ['X', 'W', 'r', 'M', '881', '8375', '3783', '1807', '9259', 'S', '1505', 'V', '5021']

A:
30631
****