Calculate the net price for 40 boxes of computer paper if the unit price is $14.58 and a single trade discount rate of 40% is allowed. The net price is s A director of accounts received a bill for $643, dated April 6, with sales terms 2/10, 1 /15, n/30. A 3% penalty is charged for payment after 30 days. What amount is due if the bill is paid on or between April 17 and April 21? The net amount due is $ Simplify your answer. Round to the nearest cent as needed.)