Swifty, inc. had net sales in 2020 of $1,506,300. at december 31, 2020, before adjusting entries, the balances in selected accounts were accounts receivable $311,100 debit, and allowance for doubtful accounts $2,490 credit. if swifty estimates that 8% of its receivables will prove to be uncollectible. prepare the december 31, 2020, journal entry to record bad debt expense. (if no entry is required, select "no entry" for the account titles and enter 0 for the amounts. credit account titles are automatically indented when the amount is entered. do not indent manually.)