A)
568,000.00
113,600.00 (20% down payment)
454,400.00 (amount of mortgage)
at 9.25% for 30 years (360 months)
rate = rate / 1,200 = 0.0077083333
Monthly Payment = [0.0077083333 + 0.0077083333 / (1.0077083333)^360 -1] * 454,400.00
Monthly Payment = [0.0077083333 + (0.0077083333 / 15.8688698943 -1)] * 454,400.00
Monthly Payment = [0.0077083333 + (0.0077083333 / 14.8688698943)] * 454,400.00
Monthly Payment = [0.0077083333 + ( 0.0005184209 )] * 454,400.00
Monthly Payment = 0.0082267542 * 454,400.00
Monthly Payment = 3,738.24
B) For fifteen years, calculate this equation
Monthly Payment = [0.0077083333 + 0.0077083333 / (1.0077083333)^360 -1] * 454,400.00
Substituting 180 months for 360 months.