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:
['v', '4119', 'I', '475', 'd', 'L', '909', 'F', 'V', '775', 'k', 'A', '9411', '8383', 'W', '1521', 'z', 'j', '7057', 'I']
answer:
32650


question:
['p', '4689']
answer:
4689


question:
['y', '7519', '7099', '9131', 'z', 'P', 'o', '6145', 'P', 'f', '9569', '9309', 'Q', '6115', '285', '8743', 'l', 'V', 'U']
answer:

63915