It uses a snack price of $3.93. Depending on what snack you choose, given the recent (and still occurring) changes, that could be doubled. I also find, that it estimates too high for a child's meal for the oop price. Looking at the menus, I couldn't price out anything to come out to the price it was suggesting. Perhaps, the low figure of the snack and the higher price of the meals evens out? I was getting $19.25 (picking the highest price meals) and it was showing $24.02. $5 may be an insignificant amount but with multiple children over multiple days, it could really skew your decision on whether to go with the dining plan or pay oop.