Please answer and explain. Thanks!

Patrick, Inc. had 2016 net sales of $1,400,000. As of December 31, 2016, before adjusting entries, the balances in the selected accounts were: Accounts Receivables, debit of $250,000 and Allowance for Doubtful Accounts $2,400, credit. A) If Patrick estimates that 2% of his net sales will be uncollectible, prepare the journal entry to record the Bad Debt expense as of December 31, 2016. B) Instead of estimating uncollectibles at 2% of net sales, assume that 10% of accounts receivable will be uncollectible. Prepare the entry to record bad debt expense. C) Instead of estimating bad debts at 2% of net sales, suppose Patrick prepares an Aging Schedule that estimates total bad debts at $24,600. Prepare the entry to record the bad debt expense