Glacier Ice Company uses a percentage-of-net-sales method to account for estimated bad debts. Histori- following 2018 2017 Gross sales $1,500,000 $1,800,000 Sales return and allowances 50,000 20,000 REQUIRED: a. Prepare the necessary adjusting entry on December 31, 2017, to record the estimated bad debt expense for 2017. b. Assume that the January 1, 2017, balance in allowance for doubtful accounts was $65,000 (credit) and that $70,000 in bad debts was written off the books during 2017. What is the December 31, 2017, bal ance in this account after adjustments? Prepare the necessary adjusting entry on December 31, 2018, to record the estimated bad debt expense for 2018. c. d. What is the December 31, 2018, balance in allowance for doubtful accounts? Assume that $85,000 in bad debts was written off the books during 2018