My number one piece of advice for doing math work is to ask yourself if the answer makes sense. For example, consider the following question:

Kanye wants to save $14000 in 8 years by making monthly payments into an ordinary annuity for a down payment on a condo at the shore. If the annuity pays an annual interest rate of 8.4%, what will his monthly payment be?

If your answer is $1.48, you should know that something went wrong.
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