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: 19, 19, ['4147', '1103', '5749', 'c', '5103', '3491', '4511', '197', 'T', '1601', 'J', 'c', '1309', 'a', '607', 'p', 'C', '9473', '5221', 'D', 'U', 'O', '5013']

SOLUTION: 5221

PROBLEM: 1, 2, ['1811', 'K', '3343', 'e']

SOLUTION: 1811

PROBLEM: 11, 12, ['9699', 't', 'a', 'A', '4219', '4781', 't', 'u', '7245', '5045', '8479', 'S', '7491', 'I', '1659']

SOLUTION:
8479