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: ['4607', 'T', 'a', '6077', 'c', '4761']

A: 15445
****
Q: ['2915', '4443', 'Z', '3409', '1417', 'H', 'T', 'u', '3373', 'U', '115', 'R']

A: 15672
****
Q: ['2095', '3929', 'D', 'd', '5763', 'd', '6445', '4613', 'a', '7649', '8817', '1473', '8403', 'Z', 'h', 'S', 'i', 'T', '7931']

A:
57118
****