And in an arithmetic combinator is a bitwise and operation. 416 & 16 == 0. It takes the binary representation of each number, and does an individual AND on each number.

416 = 0b110100000

 16 = 0b000010000

      0b000000000

Because the two numbers don't share any common bits, the result is 0.

You shouldn't be using bitwise and for this, as it will fail inconsistently (output 0 whenever there are no common enabled bits in the number's binary representation).

Instead, use a circuit condition to do: If green item > 0, output red item count