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: ['Q', '2271', '1803', '2363']

A: 6437
****
Q: ['D', 'C', '7295', 'g', 'j', '1387', 'O', '4701', 'B', 'd', 'W', 'b', 's', 'n', 'n', '4917', '2941', '1825', 'x']

A: 23066
****
Q: ['E', 'M', 'J', 'Q', '8347', 'D', '5711', '3947', 'b', 'i', '6715', '7851', 'b', 'F', 'q']

A:
32571
****