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]: ['3451', '2325', '2511', 'i', '6159', '2291', 'e', 'l', 'P', '1177', 'o', 'T']
[EX A]: 17914

[EX Q]: ['2215', '4369', 'e', '4979', '4069', 'J', 'L', '789', 'w', 'p', '9533', '8523', '2531']
[EX A]: 37008

[EX Q]: ['1715', 'p', 'e', '6967', '6641', 'W', '6267', '8653', 'R', '1687', '8913', 'N', 'f', 's', 'b', '3373', '3931', '6699']
[EX A]:
54846