Question regarding income tax rate from reading 38

[sgrimes]

I'm trying to work the problems in reading 38 of the CFA institutes workbook. Specifically, question #3 from the Problems for reading at end of chapter. My primary question is how to compute the income tax rate? Also, I think I have it figured out, but can anyone offer feedback on the variables used for the interest burden?
Thanks in advance, I've been banging my head on the table all morning, thought I would try this forum before I get a concusion.
Scott

 

[Danteshek]

You study on monday mornings???

 

[sgrimes]

I'm full time study mode (don't work). I'm working on both CFA and CFP curriculum self-study. Retired last year from Air Force, have full educational benefits for three years, so I'm trying to use up everything Uncle Sam has offered. Now, how about those variables, any suggesitons?

 

[JoeyDVivre]

If you post the question instead of a reference to the question, it would be easier to answer.