Help with these 4 I'll apreciate it

The following information pertains to inventory for a company: March 1 Beginning inventory =30 units @$5 March 3 Purchased 15 units @ \$4 March 9 Sold 25 units @ \$8 What is the cost of goods sold, assuming the company uses LIFO? The following information pertains to a company at the end of December: The company uses the aging method and estimates it will not collect 7% of accounts receivable not yet due, 13\% of receivables up to 30 days past due, and 48% of receivables greater than 30 days past due. The accounts receivable balance of $7,200 consists of $3,500 not yet due, $2,000 up to 30 days past due, and $1,700 greater than 30 days past due. What is the appropriate amount of Bad Debt Expense? A company uses the aging of receivables method. During the year, the company recorded credit sales of $540,000. Before adjusting entries at year-end, the company has accounts receivable of $350,000, of which $60,000 is past due, and the allowance account had a credit balance of $2,800. The company expects it will not collect 8% of the amount not yet past due and 22% of the past due accounts. Which of the following adjusting entries will the company record at year-end? A company recorded credit sales of $802,000, of which $540,000 is not yet due, $170,000 is past due for up to 180 days, and $92,000 is past due for nore than 180 days. Under the aging of receivables method, the company expects it will not collect 3% of the amount not yet due, 13\% of the amount past due for up to 180 days, and 24% of the amount past due for more than 180 days. The allowance account had a debit balance of $2,500 before adjustment. After adjusting for bad debt expense, what is the ending balance of the allowance account