Assume a variable

$-$

rate mortgage of

$5$

$0$

$0$

$,$

$0$

$0$

$0$

$$with j

$1$

$2$

$=$

$4$

$\%$

$,$

$$amortized over

$2$

$5$

$$years

with monthly payment. The term is

$5$

$$years$.$ Now

$2$

$$years into the term, the borrower is thinking

of refinancing it

$.$

$$How much would be the refinancing costs?

Figure out exact number with only using these variables