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]: ['1965', '8127', 'x', '4981', '8077', 'O', '467', '701', 'V', 'm', 'y', '5989', '123', 't', '4019', 'j', '1827', '8799']
[A]: 45075


[Q]: ['6731', 'f', '4561', '5601', 'i']
[A]: 16893


[Q]: ['5243', '3573', '8139', '5123', '5165', 'P', 'R', 'l', '2977', '771', '4521', 'q', '3247']
[A]:
38759