Aerospace Electronics reports $500,941in credit sales for 2018 and $597,135 in 2019. They have a $404,741 accounts receivable balance at the end of 2018, and $493,165 at the end of 2019. Aerospace uses the income statement method to record bad debt estimation at 6% during 2018. To manage earnings more favorably, Aerospace changes bad debt estimation to the balance sheet method at 6% during 2019. Determine the bad debt estimation for 2018. Round to the nearest whole dollar, no decimal places.