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, 19, ['Y', 'r', 't', '2931', '9519', '1071', '2417', 'p', 'F', '7509', 'l', '3451', '1907', 'z', 'E', 'n', '1251', 'k', 'p']

SOLUTION: 6609

PROBLEM: 2, 15, ['4175', '6415', 'U', '8883', 'J', '5843', '3923', '8991', 'P', 'm', 'S', 'T', '5819', 'q', '7405']

SOLUTION: 47279

PROBLEM: 1, 2, ['6441', 'z', 'Q', '9463', 'n']

SOLUTION:
6441