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:
['5499', '39', 'Q', 'b', 'W', '7155', '2515']
answer:
15208


question:
['q', 'U', 'I', '5245', 'g', 'Y', 's', 'V', 'b', 'V', 'D', '1193', 'p']
answer:
6438


question:
['7889', 'S', 'X', '6593', '5693', 'j']
answer:

20175