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Credit card interest calculator with grace period & different interest rate calculation methods?
I thought it was such a useful suggestion that I went ahead and created them. I'm sure you're not the only one who could derive some benefit from them, I know I will. http://www.investy.com/tools When I have some additional time, I will add the option for grace-periods, but for now I wanted to get them up so you could use the calculations as-is from the article. Enjoy. (Disclosure: I'm the founder of the site they are hosted on and I wrote the code for the calculators)