There are 7 days in a week. Knowing that the chef can make 25 pastries in a day, the weekly number can be calculated: \(25 \times 7 = 175\)
A student buys an algebra textbook for 11.11USD, a philosophy textbook for 15.83USD, and a dictionary for \(\$10.31\). What is the total cost of the books?
A blouse normally costs \(\$18.50\). How much money is saved if the blouse is purchased at a 20% discount?
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 50% off." If Frank buys two shirts, each with a regular price of \(\$49\), how much money will he save?