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.

[EX Q]: ['v', 'a', 'O', 'S', 'r', 'T', 'r', 'K', 'K', '7781', '1749']
[EX A]: 9530

[EX Q]: ['6293', 'o']
[EX A]: 6293

[EX Q]: ['3979', 'z', 'p', 's', 'y', 'f', 'C', '7569', 'g', 'M', '1305', '1001', '2699']
[EX A]:
16553