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: ['d', '6851', 'o', '5521', 'l', '3911', 'w', '1005', 'e', '3323', 'r', '7311', '4377']

A: 32299
****
Q: ['h', '2295', '2913', 'I', '5273', 'L', '2739', '8227', '6537', 'e', '6491', '5463', 'i', '4337', '537']

A: 44812
****
Q: ['W', 'u', '4919', '2059']

A:
6978
****