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: ['h', '6937', 'U', 'f', 'S', 'm', '9699', 'E', '4559', 'p', 'Z', 'o', '6409', 's', '4537', '5135', '6901', '6489', '5833', 'l']

A: 56499
****
Q: ['u', 'B', '2509', 'U', 'R', '7497', '1897', '8697', 't', 'W', '1021', '7937', 'F', 'g', '6901', 'I', '2957']

A: 39416
****
Q: ['y', 'R', '4681', '1363', 'o', '9555', 'e', '6937', '5927', '1805', 'w', 't', '6145', '4107', '329', '1887', 'i', '9129']

A:
51865
****