The down payment is 15% of $230,000 = $34,500
So the base amount is $230,000 - $34,500 = $195,500.
Two points on this amount is 2% x $195,500 = $3910 which is part of the mortgage which is now
$195,500 + $3,910 = $199,410
The payment on this loan (From EXCEL) will be $1606.43 meaning that the total paid on the mortgage will be
$1606.43 x 240 = $385,544.01 So interest paid will be $385,544.01 - $199,410 = $186,134.01