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]: ['Q', '9787', '7533', '9489', 'C', '1753', '5121', '1405', '9267', '4815', 's', '5887']
[A]: 55057


[Q]: ['6941', 'I', 'j', '6135', '6525', '7853', '5607']
[A]: 33061


[Q]: ['6249', '5411', '509', 'g', 'F', 'P', 'r', 'C', '3427', '4239', 'y', 'l', 'T', 'b', 'o', 'x', '6907', '6277', 'W', 'V']
[A]:
33019