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: 5, 21, ['f', 'c', 'y', '1711', '3261', 'I', '3249', 'O', '7875', 'm', '7665', '375', 'V', '4561', 'v', 'J', '2809', '2081', 'i', 'v', 'S', 'f', '8393', 'P', 'r', '4103', 'q', '1141', '9971', '671']

SOLUTION: 31876

PROBLEM: 16, 20, ['7527', '5121', 'Q', '4585', '9735', 'Y', 'e', 'p', '755', '8605', 'B', 'O', 'X', '3887', 'M', '8347', '2391', 'v', 'F', '5509', 'e', 'g', 'm', 'j', 'P', 'J']

SOLUTION: 16247

PROBLEM: 17, 20, ['5595', 'E', 's', 'w', '6775', '673', 'M', '7263', '4947', 'U', 'U', '1525', 'D', '5739', '7303', '8145', '373', '89', '2263', 'R', '9087', 'T', '5193']

SOLUTION:
2725