Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

How do you compare the sales of a company like Coca Cola against another company like JPMorgan Chase to figure out the best investment opportunity?
The question isn't sales but profits. Banks traditionally profit by making loans. Just as with a physical product, there are costs involved, income produced, and the difference between the two is gross profit. From there you can get net profit, and from there you can look at efficiency or profit per share or whatever other metric floats your boat. Or you can just  buy index funds, get average rates of return, and not have to think about it.