please help with 1,2 and 3

JULES, TU SULUTUS Question Completion Status: QUESTION 1 Days' payable outstanding is used to calculate: The average length of time that payables are deferred until payment is made. The cost of storing inventory. The cost savings for taking purchase discounts. The average length of time that the bank takes to process payment. The average length of time to collect from credit customers. QUESTION 2 For a retailer, the sales journal includes columns for each of the following except: Customer's name. Supplier's name. Cost of Goods Sold and Inventory entry. Accounts Receivable and Sales entry. Invoice number QUESTION 3 Which of the following is not an output device? Bar code readers. Web communications, Monitors. Smartphones