instruction:
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.
question:
['z', 'j', 'M', 'E', '1689', '8413', '2603', 'b', '5101', 'w', 'r']
answer:
17806


question:
['3051', 'Z', 'q', 'u', 'x', '2747', 'e', 'B', '4225', 'Q', 'R', '4629', 'F']
answer:
14652


question:
['a', '449', '299', '6261', '2565', '6631', 'z', '9703', 'X', '1699', '6597', 'r', 'r', '4237', '4073']
answer:

42514