Total Debt vs Total Liabilities

the difference is clear … but the CFAI book is confusing the heck out of me.

Alt Investment & Fixed Income book, Credit Analysis reading 48, problem 27 on Page 189.

It is asking for the debt payback which is Total Debt/Discretionary CF

This is what is given …

Current Liabilities: account payable $37,917; short & current long term debt $13,073; other current liabilities $8,579

Long Term Debt: $23,285

The book solution uses Total Liabilities as Total Debt

instead of using Total Debt = Short & Current long term debt + Long Term Debt

Is this a mistake?

Thanks

i also made this mistake on the same problem. sometimes feel like they define things the way they want and can change their mind whenever they want!