Information on Sandhill Company for 2021 follows: Total credit sales $900,000 Accounts receivable at December 31 36,000 Uncollectible accounts written off 18.000 Amount collected on accounts previously written off (after write off but before year end) 4.000 Assume the same facts as in part (a) except that the Allowance for Doubtful Accounts had a $11.700 balance on January 1, 2021. What amount of bad debt expense will Sandhill record on December 31, 2021? Bad debt expense $ Information on Sandhill Company for 2021 follows: Total credit sales $900,000 Accounts receivable at December 31 36,000 Uncollectible accounts written off 18.000 Amount collected on accounts previously written off (after write off but before year end) 4.000 Assume the same facts as in part (a) except that the Allowance for Doubtful Accounts had a $11.700 balance on January 1, 2021. What amount of bad debt expense will Sandhill record on December 31, 2021? Bad debt expense $