Final answer:
The calculation of multiplying the stable monthly income by 0.31 represents the maximum amount of monthly income that a borrower can allocate towards their mortgage payment.
Step-by-step explanation:
The calculation of multiplying the stable monthly income by 0.31 represents the maximum amount of monthly income that a borrower can allocate towards their mortgage payment.
For example, if a borrower has a stable monthly income of $5000, they can afford to spend a maximum of $1550 ($5000 * 0.31) per month on their mortgage payment.
This calculation helps lenders determine the borrower's affordability by ensuring that the mortgage payment is within a reasonable percentage of their monthly income.