Answer:
Mortgagee B pay for the property following amount;
441,433 + 81,910 = 523,343
Note:
As it is already given in the question that B pays for property at a foreclosure sale and also not raising additional funds.
So it is quite straight that B pay for the property $523,343
Mortgagee B pay for the property at a foreclosure sale without having to raise additional funds are $523,343