As major cloud providers (AWS, Azure, Google, and IBM) continue to drop the prices of cloud instances, they have added discounting options, added instances, and dropped the billing increments, in some cases, to per second billing. Costs come down, but complexity increases. Understanding how to navigate this complexity is critically important. We estimate that companies will waste more than $10 billion in the next 12 months on their cloud spend. So how do you begin to understand cloud costs?