please solve the questions 3,4,5,6

Bonnie Company sells an equipment to a customer in exchange for a 9 month, 6 percent note for SI5,000. What amount will be collected by Bonnie Company from the customer when the note matures? Williams Company uses the percentage-of-sales method to estimate uncollectible accounts. Net credit sales for the current year amount to $200,000 and management estimates 6% will be uncollectible. At the end of the year, the Accounts Receivable account has a balance of 5100,000, and the Allowance for doubtful accounts prior to adjustment has a credit balance of $8,000. The net realizable value of accounts receivable reported on the balance sheet will be: Alex Company expects that 3 percent of their gross accounts receivable will not be collected. If the balance of the company's allowance for doubtful accounts is $6, 300, what must be the net realizable value of accounts receivable? Maryland Company's Allowance of doubtful accounts had a balance of $6, 700 on December 31, 2014. During the year 2015, the company wrote off $7, 400 of accounts deemed uncollectible. Based on estimates on various ages of receivables, the company estimated uncollectible accounts receivable on December 31, 2015 to be $7, 900. Determine the bad debts expense for 2015