At the beginning of the year, Arianne had a net worth of

$4 comma 0004,000.

During the year she set

aside$ 100$100

per month from her paycheck for savings and borrowed

$500500

from her cousin that she must pay back in January of next year. What was her net worth at the end of the year?

At the end of the year, Arianne's net worth is

$nothing.

(Round to the nearest dollar.)