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', 'j', 'Z', 'u', '7427', '4225', '3139', '9993', '9945', '3639', 'h', 'j', 'f', '6511', 'e', '4607', '2741', '4743']
[EX A]: 56970

[EX Q]: ['o', '445', '2601', 'h', 'V', 'C', 't', 'o', 'H', '3707', '7601']
[EX A]: 14354

[EX Q]: ['8667', '4129', '7075', '6345', '1315', 'M', 'F', '9073']
[EX A]:
36604