1. Is $235,000+ 4.2% =244,870 4.2% out of $235,000 is $9,840 Where i got $244,870 12x20=240 So 20 years= 240 months So I divide $244,870 by 240 months is $1,020.291667 Which is $1,020.29 cents. If you multiply that $1,020.29x240=$244,869.60 round to nearest dollar 60 cents is over 50 which would make it $2444,870.