Abby, Zoë and Enzo

We rewarded the girls with some ice-cream on the walk home.  We stopped at the self service place and the total was R$4 = US$2.18.  Laura got a scoop and a chocolate bon bon (R$0.70 = US$0.38).  The girls got a small dish full of ice-cream, I scooped the flavors they chose.  They prefer it when I scoop it, so they can try so many different flavors.  This time, each got three flavors.  The cost of the self service is R$1.99 = US$1.08 per 100 grams.  Surely this ice-cream is more dense than water, and water has a density of almost 1 g/mL. So this ice-cream costs almost US$1 per 100 mL (assuming waters density). At the super market, they sell 1.8 liter containers of ice-cream for R$10 = US$5.45. This is slightly smaller than our half gallon blocks of ice-cream. Without knowing the density of the ice-cream, it would seem to be up to 2x as expensive to buy the self service ice-cream than to buy the largest container at the super market, unless the ice-cream is twice as dense as water, then it would cost the same, but it more likely has a density of 0.90 g/ml.  Maybe next time at Hiper Bom Preço I will weigh the ice-cream container, minus some for the container and figure out the ice-cream density and cost difference more accurately.  Judging from the Häagen Daz density, 100ml = 90g, the self serve will be about 1.8 times as expensive as super market 1.8 liter container.  That being said, the ice-cream price per half gallon is already into the premium ice-cream prices at our local store in New Hampshire.  At Hiper Bom Preço a tiny 100 ml (90g) (shot glass size mini-cup) of Häagen Daz ice-cream was R$8.99 = US$4.88.  It is funny that the container indicates 2 portions, each 45g in size.  That is litterally a large single tablespoon per serving.