It's 5 over 9 because you start off with 10 cards (6 roses 4 daisies) then you pick a rose. Then it become's 5 over 9 since there are only 5 roses left and 9 total cards left.
753,249 - 575,388 = 159,861
i hope it's right :)
6.74
7.69
5.92
6.68
i listed the unit prices in order and the lowest unit price is for the 10 oz one