Generally when you buy ads, you may choose to pay per click that goes to your page at all, or you may choose to pay (more) per person who actually pays money for whatever you're selling. I can easily see a funeral flower company spending $20 per person who buys from them by being directed there by google, especially as the margins in the funeral industry are sky high.
Here, it's probably an aggregate of CPC per client put next to "common Google trends searches for that industry", without actually any data to correlate that CPC is actually that high for a particular request.