Answer:
The mathematical equation for calculating the monthly interest is
I = P * (r / n)
where:
I is the monthly interest
P is the loan amount minus the down payment (i.e., $245,000 - $44,000 = $201,000 in this case)
r is the annual interest rate (i.e., 3.5%)
n is the number of payments per year (i.e., 12 for monthly payments)
then I = $201,000 * (0.035 / 12) = $711.06