Clerk: Can I help you?
Tamika: I’d like to buy some stamps.
Clerk: In what denomination?
Tamika: I’m not sure. I need them for sending regular letters and for Priority Mail.
Clerk: The current rate for sending a first-class letter is 41 cents. With first- class service, your letter will get there in three to seven days for domestic mail.
Tamika: For the first-class stamps, how many come in a book or a roll?
Clerk: There are 20 in a book and 100 in a roll. To send a Priority Mail envelope, you can get $4.05 stamps, and delivery is usually in two to three days. How many would you like of each?
Tamika: I’ll take one book of the stamps and four Priority Mail stamps. Can I buy stamps to send an Express Mail envelope, too?
Clerk: You can. Those are $14.40 each.
Tamika: Could you add one of those, too? And how much is it to send a postcard? I don’t need any stamps for those today, but I’m just curious.
Clerk: It’s 24 cents to send a postcard. Okay, that’s a book of 41-cent stamps, four Priority Mail stamps, and one Express Mail stamp. Anything else?
Tamika: Could I pick the design of the first-class stamps?
Clerk: Yes. You can choose from these commemorative ones or the standard flag design.
Tamika: I’ll take the commemorative ones.
Clerk: Your total comes to $38.80.
Tamika: Here’s $40.
Clerk: Here’s your change and your stamps. Have a nice day.
Tamika: Thanks. You, too.