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]: ['g', 'A', 'r', '539', '5459', '2725', '7447', '3693', '1757', 'r', 'W', '5949', '4569', '5153', '3985', 'Q', '505', 'M', '8989']
[A]: 50770


[Q]: ['2433', '41', 'F', 'A', 'c', '837', 'h', 'c', '6239', '2583', '8153', 'k', 'Z', 'g', '3483', 'R', '3387', 'p', '6401']
[A]:
33557