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: ['61', '5695', 'u', '253', 'n', '1035', 'd', '3017']

A: 10061
****
Q: ['6051', '5303', '1509', '2797', 'Z', '4777', '721', '8563', 'K', '63', '9115', 'd', '7305', '9743', '7409']

A: 63356
****
Q: ['Q', '4515', '359', '5387', 'b', '2605', '5203', '4739', '4891', '1553', 'U']

A:
29252
****