The balances in Nula's Accounts Receivable and Allowance for Doubtful Accounts on December 31, 2019 were $112,000 and $6,300 (Credit) respectively. An aging schedule indicated that $14,500 of the receivables would end up being uncollectible. The amount of bad debts expense that had to be recorded was: Select one: a. $14,500 b. $8,200 c. $6,300 d. $1,900