I Followed The Book And Example And Still Keep Getting The Answer Wrong Can You

I followed the book and example and still keep getting the answer wrong. Can you help?

Percent of Sales Method

At the end of the current year,  has a balance of $2,150,000;  has a debit balance of $10,500; and sales for the year total $51,850,000.  is estimated at 1/4 of 1% of sales.

a. Determine the amount of the adjusting entry for uncollectible accounts.

$

b. Determine the adjusted balances of Accounts Receivable, Allowance for Doubtful Accounts, and Bad Debt Expense.

Accounts Receivable$

Allowance for Doubtful Accounts$

Bad Debt Expense$

c. Determine the  of accounts receivable.

$