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:
['y', 'p', '3553', '2155', 'b', 'R', 'j', 'V', 'U']
answer:
5708


question:
['4939', 'g', 'S', '5323', '437', '9665', 'J', 'O']
answer:

20364