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]: ['Z', '4157', '5185', 'U', 'i', '1115', 'A', '7427', '3313', 'S']
[A]: 21197

[Q]: ['3013', '3955', 'f', '1183', '5111', '9509', '2351', '7087', 'f']
[A]: 32209

[Q]: ['N', 'j', 'p', '9989', 'z', '8547', '2575', '2789', 'j', '4569', 'C', 'X', '1463', '4563', '5989', '689', 'd', 't', '1765', '1795']
[A]:
44733