You need 50g of sugar. So you can look at how many grams are in the serving size and multiply. So if 8 oz of your favorite juice has 20g of sugar then you'll need to drink 2.5 servings (2.5x8=20 oz) of that juice. Here's a link to one of the jelly bean studies: http://www.ncbi.nlm.nih.gov/pubmed/10561636. This one required 28 jelly beans.
The meal I ate was a PB&J sandwich with 2-4 TBS of jam (depending on the jam), a glass of milk, and an apple.
Yes right here.