need help with this question.. please show formulas and workings as well. thank you

On December 31, 2020, when its accounts receivable were $264,000 and its Allowance for Doubtful Accounts had an unadjusted debit balance of $1,800, Accustart Corp. estimated that $14,800 of its accounts receivable account would become uncollectible, and it recorded the bad debts adjusting entry. On May 11, 2021, Accustart determined that Fei Ya Cheng's account was uncollectible and wrote off $1,700. On November 12, 2021, Cheng paid the amount previously written off. (b) X Your answer is incorrect. What is the carrying amount of the receivables on (1) December 31, 2020; (2) May 11, 2021; and (3) November 12, 2021, assuming that the total amount of accounts receivable of $264,000 is unchanged on each of these three dates except for any changes recorded above. Carrying amount December 31, 2020 $ 247400 May 11, 2021 $ November 12, 2021 $