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]: ['4997', '5005', '6773', 'q', 'K', '8391', '7303', 'K', 'N', '5417', '8573', 'z', '8653', '8343', 'm', 'L', '1587', 'p', '5323']
[EX A]: 70365

[EX Q]: ['9211', '1889', '7371', '9649', 'b', 'y', 'q', 'a', 'i', '1137', '3291', '8625']
[EX A]: 41173

[EX Q]: ['135', 'a', 'X', '8067', '8447', '4009', '4221', 'o', 'A', 'x']
[EX A]:
24879