TASK DEFINITION: In this task, you are given inputs i,j, and A, where i and j are integers and A is a list. You need to return the sum of all the numerical elements in the list A between the positions i and j (including positions i and j). Return 0 if no numerical element is present in the list between the given ranges. i and j will be non-negative, and will always have a value less than the length of A. i will always be less than j.
PROBLEM: 11, 15, ['S', 'F', 'q', 'r', 'X', '2063', '9327', 'R', 'T', 'B', 'j', 'b', 'T', 'X', '3469', 'E', '2177', '8143', 'U', 'Z', '8007', '4991', 'v', 'm', 'f', '7173', 'N', '2449', '2291']

SOLUTION: 3469

PROBLEM: 2, 9, ['F', '7137', '6127', 'q', '6637', '1423', 'w', '4175', '8971', '3999', '193']

SOLUTION: 34470

PROBLEM: 1, 5, ['2925', 'S', '6405', 'Z', '5255', 'b', '8023']

SOLUTION:
14585