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: 4, 10, ['C', '6511', 'S', '5389', '5679', 'O', 'Z', 'm', 'p', '1135', '7887', '6407', '6561']

SOLUTION: 12203

PROBLEM: 1, 2, ['4319', '3495']

SOLUTION: 7814

PROBLEM: 14, 26, ['X', '4891', 'B', 'b', 'M', 'x', '6019', 's', 'E', 'e', 'Q', 'p', 'f', '9699', 'a', '4029', '1749', '4393', 'l', 'f', 'A', '2875', 'b', 'S', 'N', '7647', 'X']

SOLUTION:
30392