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

A: 15672
****
Q: ['8591', 'J', 'l', 'l', '7023', 'N', 'n']

A: 15614
****
Q: ['J', 'P', '5141', 'v', '6971', 'M', '4669', '4601', '8897', 'p', '8999', '3779', '3277']

A:
46334
****