After$-$tax cost of debt For the following $$1,000-$par$-$value bond, assuming annual interest payment and a $21\%$

tax rate, calculate the after$-$tax cost of debt. $($Click on the icon here in order to copy the contents of the data table

below into a spreadsheet.$)$

The after$-$tax cost of financing using the approximation formula is

$\%.($Round to two decimal places.$)$