Import Exclusives Ltd. received an invoice from Dansk Specialties of Copenhagen with terms 5/20 R.O.G. for the items listed below. 100 teak trays at $30.80 each 25 teak buckets at $67.60 each 35 teak salad bowls at $55.20 each 1 32-%, 1 All items are subject to trade discounts of 32 3 %, 6%, and 6%. (a) If the shipment was received on April 22, what is the last day of the discount period? (b) What is the amount due if the invoice is paid in full on May 6? (c) If only a partial payment is made on the last day of the discount period, what amount is needed to reduce the outstanding balance to $2900?