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]: ['2225', '1925']
[EX A]: 4150

[EX Q]: ['c', '7415', '6253', '4477', 't', '9449', '7733', '2325', 'Z', '5413', 'q', 'm', 'R', '8619', '7289', '857', '7273', '7425']
[EX A]: 74528

[EX Q]: ['c', 'H', '4537', 'U', '3371', 'b', 'z', 'i', 'D', '5255', 'Y', '1187']
[EX A]:
14350