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: ['a', 'j', 'v', '619', 't', 'a', '5777', 'x', 'R', 'P', '8897', 'j']

A: 15293
****
Q: ['6849', 'I', 'p', 's', 'L', '4757', 'j', 'x', 'm', 'P', '5237', '1105', '9015', '9279', 'Q']

A: 36242
****
Q: ['4367', '617', 'q']

A:
4984
****