Elsa told Olaf that she would give him $2 for each fresh-baked bagel that she gave him. Olaf smiled and said he’d get to work right away. After a few hours, Olaf showed up with 2000 bagels for Elsa, who was stunned. Elsa upheld her side of the bargain and gave Olaf $4000. However, Olaf was only able to keep $1000 for himself. What happened to the remaining $3000?