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]: ['M', 'F', '4477', '1565', '4407', 'r', 'v', '7237', '83', '5243', 'O', 'z', 'W', '7703', 'Q', 'i', '9657', 'n']
[EX A]: 40372

[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]: ['9465', '1031', 'D', 'K', '4273', 'h', '397', '3331', 'U', '2583', 'G', '6333', '1257', '3483', 'E', '8769']
[EX A]:
40922