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]: ['9869', '7701', 'H', 'o', 'v', '1431', 'O', 'L']
[EX A]: 19001

[EX Q]: ['r', '3139', 'C', 'L', '7335', 'v', '9861', 'F']
[EX A]: 20335

[EX Q]: ['e', 'K', 'm', 'Z', 's', 'z', 'Y', '2117', 'r', 'c', '6937']
[EX A]:
9054