Answer:
665280 ways
Explanation:
When learning about combinations and permutations, you will learn about specific keywords that apply to both. In this problem, the keyword "arrange" was used, letting you know that the problem required permutation.
There are twelve toppings, but we are looking at only the left column, meaning that there are only 6 possible positions open. This will give you the permutation 12 P 6.
The formula for permutations is n P r = (n !)/(n - r)!
For this problem, you would have 12 ! / 6 ! which gives you 665280.