Calculating Amortization for EBITDA

[Daniel Grandfield]

I was trying to determine the unlevered free cash flow for a property and was wondering how to determine the amortization that you are suppose to add back into the equation. Below is the equation.

Unlevered free cash flow = earnings before interest, tax, depreciation, and amortization - capital expenditures - working capital - taxes

I was able to obtain all the information but wasn't sure what the amortization was referring to? Total principal and interest paid in a year?

Thank you for any help!