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: 7, 18, ['279', 'o', '8421', 'e', '2167', '6647', 'i', 's', 'I', 'G', '8201', 'E', 'h', 'U', '403', 'c', 'u', 'B', '9415', 't', 'a', '8787', 'E', '9677']

SOLUTION: 8604

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

SOLUTION: 1811

PROBLEM: 12, 16, ['9589', '1473', '2025', '9287', '8285', 'A', '1067', '3087', '7243', '3953', 't', '1831', 'c', '3585', 'm', 'i', '3477', '7583', '4393']

SOLUTION:
5416