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: ['M', '9387', '7125', 'c', '1295', 'X', 'l', '9867']

A: 27674
****
Q: ['1001', 'T', 'w', 'f', 'Q', '4035', 'b', 'q', 'x', 'R']

A: 5036
****
Q: ['Y', 'l', 'U', 'F', '9495', '7871', 'L', '5441', 'x', 'A', '6001', 't', '2889']

A:
31697
****