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]: ['q', '5151', 'R', '441']
[A]: 5592


[Q]: ['1869', 'q', '5919', 'D', '7733', '2641', 'h', '1327']
[A]: 19489


[Q]: ['7197', '7535', 'g']
[A]:
14732