Two for the Price of One

Yesterday I was out shopping with my daughter and we got to discussing a price tag that said "Two for the Price of One".  She asked "What would it cost if you wanted 3?" and I explained that you could work it out by splitting the 3 into 2 + 1.  The "Two for One" would only apply to the 2, and you would have to pay the full price for the 1.  I then summed it up as "Half Price for Even Quantities".  Thinking about this now, a better way to sum it up would be as (p div 2) + (p mod 2), where p is the original price in pennies.

Comments

[Aydin]

Stores around here frequently have "2 for $xx" sales. But, if you want only 1, they charge you not the usual price for 1 item, but the half of the sale price for 2, or xx/2.

In other words, they are actually lowering the unit price, but making it sound as if the sale is for 2 items.