I used tip.it's thieving calculator and was able to figure out the exact amount of juices needed for 1-25, 25-45, and 45-65. Kind of easy to figure it out.
EDIT: Just found this in my notes.
1-25: 115 Winter Fruits or 23 Winter Juices.
25-45: 160 Spring Fruits or 40 Spring Juices.
45-65: 507 Autumn Fruits or 169 Autumn Juices.
Btw, you I collect 232 beer glasses before I bot ;P