A furniture store has a sale during which the sale price of the sofa is 1/2 off its original price the original price of the sofa is 1,029.00, a customer can get an additional 5%off discount off the sale price for paying with cash , at checkout a 6.5% sales tax on the final price is added to the cost of the sofa . what is the total cost of the sofa ,including sales tax , for a customer paying with cash ?

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?