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.

[Q]: ['7459', '491', '7823', '6965', 'H', '109', 'R', 't', '3959', '2821', 'R', '2807', 'o', 'v', '1305', 'a', '1411', 'r', '3669']
[A]: 38819


[Q]: ['h', '1157', 'm', '8975', '6165', '7491', '1855', '3489', '9629', '631', '9641']
[A]: 49033


[Q]: ['d', 'D', 'm', 'm', 'E', 'H', '4757', '2169', 'l', 'K', '7419', 'F', '5009', 'm', 'g', 'Q', 'L', 'F', 'z', '443']
[A]:
19797