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: ['M', 'H', 'l', 'Y', '3811', '1953', '5869', 'U']

A: 11633
****
Q: ['8361', '6757', '5341', '2597', '9803', 'a', 'd', '5889', '9823', 'd', '7947', 'y', 'p']

A: 56518
****
Q: ['O', 'F', '6065', '3937', '7567', '5735', 's', '81', 'i', '4097', 'q', '8543']

A:
36025
****