Answer:
1. 5.80%
2. 4.52%
Explanation:
In this question, we use the Rate formula which is shown in the spreadsheet.
The NPER represents the time period.
Given that,
Present value = $1,000 × 108% = $1,080
Assuming figure - Future value or Face value = $1,000
PMT = 1,000 × 6.8% = $68
NPER = 11 years
The formula is shown below:
= Rate(NPER;PMT;-PV;FV;type)
The present value come in negative
So, after solving this,
1. The pretax cost of debt is 5.80%
2. And, the after tax cost of debt would be
= Pretax cost of debt × ( 1 - tax rate)
= 5.80% × ( 1 - 0.22)
= 4.52%