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.

[EX Q]: ['o', '7099', 'G', 'v', 'H', 'J', 'k', '1607', 'i', '9765', '2489', '8031']
[EX A]: 28991

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

[EX Q]: ['p', '6579', 't', '2581', '1725', '4117', '4603', 'A', '3139', '2011', '935', '1475', 'K', '8399', 'f', '8457', '7225', '7323', '797', 'v']
[EX A]:
59366