Roberto sold a pickup truck for $19,000 in an installment sale. He reported his gain in full in the year of sale. Two years later, the buyer was in default, and Roberto repossessed the truck. At the time of repossession, the truck had a fair market value of $16,000, the buyer still owed $11,000, and the cost of repossession was $600. What is Roberto's gain or loss on the repossession? Loss of $3,600. Loss of $3,000. Gain of $3,000. Gain of $4,400