Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
6120k^(6+60)(1-k)/(1-k^(60)), k=1+.2265/12
6120k^(6+60)(1-k)/(1-k^(60)), k=1+.2265/12
Natural Language
Math Input
Extended Keyboard