The general ledger account for Accounts Receivable has a debit balance of $100,000. The Allowance for Doubtful Accounts has a credit balance of $10,000. Sales for the year were $700,000. In the past 5% of sales have been uncollectible. Calculate (1) Bad Debt Expense and (2) the ending balance of the Allowance for Doubtful Accounts using the percentage of sales method. Show your work