Each Starter Kit makes 12 Refills, that's $2.16 a bottle. Then, you just need to add the refills for $12.99, that's $1.08 a bottle after that. Wow!
What would 12 bottles of conventional cleaner cost you? About $47.88 for the average cleaner. Buying the "fancy" green cleaners? You're spending up to $107.88 for 12 bottles. Yikes!