Arrange the sentences P, Q, R, S and T in the correct order to form a meaningful paragraph.

P: Yet many buyers think of the first price as four hundred and something, and of the second as five hundred.
Q: Shopkeepers know this habit well, and that is why the trick has lasted so long.
R: Shops often price an article at Rs 499 instead of Rs 500.
S: Their minds, in other words, stop at the first digit and pay little attention to the rest of the price.
T: The difference of one rupee hardly matters to anybody's budget.