i need help with these questions

Sandown Appliances received an invoice dated October 13 with terms 4/10 E.O.M. for the items listed below. 6 refrigerators at $1020 each less 20% and 6% 5 dishwashers at $649 each less 18%, 12.7%, and 3% (a) What is the last day for taking the cash discount? (b) What is the amount due if the invoice is paid on the last day for taking the discount? (c) What is the amount of the cash discount if a partial payment is made such that a balance of $1700 remains outstanding on the invoice? (a) The last day for taking one cast discount is | November (Type a whole number.) (b) The amount due is $ - (Round to the nearest cent as needed.) (c) The cash discount is $ -|. (Round to the nearest cent as needed.)Gazelle Corporation received an invoice dated September 6 with terms 2/10, n/30. The amount stated on the invoice was $2279.00. (a) What is the last day for taking the cash discount? (b) What is the amount due if the invoice is paid on the last day for taking the discount? (a) The last day to take the cash discount is September 16. (b) The amount due is $ - (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.){it Shamin Jewelers sells diamond necklaces for $438.00 less 12%. Magnico Jewelers offers the same necklace for $489.01] less 33%, 18%. What additional rate of discount must Shamin offer to meet the competitor's price? The additional rate of discount that Shamin Jewelers must oifer to meet the competitor's price is I: Eli}. (Round to two decimal places as needed. Round all intermediate values to six decimal places as needed.)