4. Harney Inc. uses the percentage of credit sales method of estimating doubtful accounts. The Allowance for Doubtful Accounts has an unadjusted credit balance of $5,700 and the company had $290,000 of net credit sales during the period. Harney has experienced bad debt losses of 6% of credit sales in prior periods. After making the adjusting entry for estimated bad debts, what is the ending balance in the Allowance for Doubtful Accounts account?
a. $11,700.
b. $17,400.
c. $11,400.
d. $23,100.