Evil Pop Co. began the year with net fixed assets of $17,708 and had $19,121 in the account at the end of the year. During the year, the company paid $4,438 in interest and expensed $3,940 in depreciation. The company purchased $9,380 in fixed assets during the year. How much in fixed assets did the company sell during the year?

Please explain how you got it and not just the answer. I need help with the concept. Taking an online class and have no guidance at all. Thank you