I need help with these questions

A hardware store buys outdoor lights for $4.00 per dozen less 26%, 14%. The store's overhead is 33% of cost and the required profit is 21% of cost. For how much per dozen should the lights be sold? The selling price should be $ - | per dozen. (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.)What amount will reduce the amount due on an invoice of$254523 by $926.06 if the terms of the invoice are 2:"'15, n.t45 and the payment was made during the discount period? The payment amount is H. (Round the nal answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) A car accessory is sold for $53.34. The store's markup based on cost is 53%. (a) What is the cost of the car accessory? (b) What is the rate of markup based on selling price? (a) The cost of the car accessory is $ - (Round the final answer to the nearest cent as needed. Round all intermediate values to six decimal places as needed.) (b) The rate of markup based on selling price is -% (Round the final answer to two decimal places as needed. Round all intermediate values to six decimal places as needed.)