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: 1, 2, ['j', '3613']

SOLUTION: 3613

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: 3, 8, ['r', 'A', 'W', 'b', '6573', 'X', 'X', '8983', '5137', '621', 'h', '3797', '417', '8755', '7991', 'm', '923']

SOLUTION:
15556