Please explain and show work for all except 19.

(Highlighted answers are correct)

18. Helix Company has a $280,000 balance in Accounts Receivable and a $2,000 debit balance in Allowance for Doubtful Accounts. Credit sales for the period totaled $1,800,000. What is the amount of the bad debt adjusting entry if Helix uses a percentage-of-receivables basis (at 10%)? $30,000 b. $28,000 c. $32,000 d. $30,400 a. 19. The constraint of conservatism is best expressed as: the cost of applying an accounting principle should not exceed its benefit. b. only material items should be recorded and reported c. when in doubt, choose the method that will least likely overstate assets and net income. d. the lower-of-cost-or-market method should be used for inventories. a. 20. If merchandise is sold for $2,000 subject to credit terms of 2/10, n/30, the entry to record collection in full within the discount period would include a a. debit to Sales Discounts for $40 b. credit to Cash for $1,960 c. credit to Accounts Receivable for $40 d. None of the above. 21. Barken Company's records show the following for the month of January Total Retained Earnings at January 1 Total Retained Earnings at January 31 Total Revenues Total Dividends Declared $600,000 750,000 1,005,000 60,000 Total expenses for January a. $1,110,000. b. $1,155,000 c. $855,000 d. $795,000 were