500
                            If you buy one rose at the store, it will cost $1.25, but if you buy a dozen, they only cost $12.00 .   Jill wants to buy 12 roses. How much money can she save if she buys a dozen instead of buying 12 roses, one at a time?
                            12 single roses would cost $15.00 (12 x $1.25) .  $15.00 - $12.00 = $3.00.   She would save $3.00 if she bought them by the dozen.