Doris Wade purchased a condominium for

$$$$45$ comma $000$

in

$1980$

$.$

Her down payment was

$$$$38$ comma $000$

$.$

She financed the remaining amount as a

$$$$7$ comma $000$

$,$

$35$

$-$year

mortgage at

$7$

$\%,$

compounded monthly. Her monthly payments are

$$$$190$

$.$

It is now

$1995$

$(15$

years$$ later$)$ and Doris has sold the condominium for

$$$$110$ comma $000$

$,$

immediately after making her

$180$

th

payment on the unit. Find her effective annual internal rate of return on this investment.