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


[Q]: ['6957', '4603', '5299', '8451', '9803', 'b']
[A]: 35113


[Q]: ['2833', '4783', '2061', '4961', 'q', 'V', 'd', 'v', 'D', '2009', '771', '2223', '8639', 'R', '6923', 'l']
[A]:
35203