3. Ivanhoe Co. provides for doubtful accounts based on 2% of gross accounts receivable. The following data are available for 2020. Credit sales during 2020 Bad debt expense Allowance for doubtful accounts 1/1/20 Collection of accounts written off in prior years (customer credit was reestablished) Customer accounts written off as uncollectible during 2020 $3,804,000 57,090 18,060 7,530 27,110 What is the balance in Allowance for Doubtful Accounts at December 31, 2020? Allowance for doubtful accounts 12/31/20 $ 4. At the end of its first year of operations, December 31, 2020, Shamrock Inc. reported the following information Accounts receivable, net of allowance for doubtful accounts $875,400 Customer accounts written off as uncollectible during 2020 23,400 Bad debt expense for 2020 85,240 What should be the balance in accounts receivable at December 31, 2020, before subtracting the allowance for doubtful accounts? Accounts receivable, before deducting allowance for doubtful accounts $