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

A: 63356
****
Q: ['A', '9979', '8723', '1131', 'i', 'p', 'M']

A: 19833
****
Q: ['q', 'R', 'F', '6779', 'O', '3831', '37', '2885', '6817']

A:
20349
****