A company uses a gross method for recording cash discounts and the income statement method for assessing bad debt expense. Sales revenue for credit sales during the period was $$300.$ Sales discounts of $$20$ were also recorded when collecting customer accounts. The allowance for doubtful accounts has a credit balance of $$10$ at the beginning of the period and the ending balance of the accounts receivable account for the period was $$200.$

Determine bad debt expense for the period if the company uses a $10\%$ estimate.