Lesson 3

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This one has a common error that many students are making which is to confuse a decimal with a floating point. The instructions direct you to use a decimal (which, allow me to remind you, is constructed by passing the decimal itself as a string to the `Decimal()` constructor.

One more missed direction is that `TOTAL` should be `None` when it doesn't fit a classification.

Another error that I can see is that you didnt' put an appropriate lower bound on the loan. In the table of values it states 0 --> 199,999. The test is testing for bad input as well as good so please be aware that you should guard your lower bounds as well as your upper ones.