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]: ['l', '2511', '2071', 'o', 'F', '7583', '1909', '1859', '3299', '3853', 'h', 'P', 'P', '9175', 'B', 'F']
[EX A]: 32260

[EX Q]: ['C', '3133', '2183', '5793', '9305', 'd', 'g', '6501']
[EX A]: 26915

[EX Q]: ['9571', 'L', 'E']
[EX A]:
9571