Find the sum of the odd numbers within an array, after cubing the initial integers

but

The function should return undefined/None/nil/NULL if any of the values aren't numbers

so, what if number is float (not equal to its integer part)? It is a number, but it is not an odd number (even or odd are defined only for integer)
Seems like, text might be
"The function should return undefined/None/nil/NULL if any of the values aren't integers"
and there must be any test with float (at least there are none of those in python version)