Packing the food

I am working on my final food preparations prior to shipment via air down to Chile. I am trying to figure out how to pack 90 days of food into the sled so I still have some room for something.

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90 bags is sure going to be a lot of space. Having everything pulverized & mashed into smaller space would definitely be better.
Also, I am trying to figure out why my bag of simulated food weighs way more than my food weight estimate. Either the packaging lies on some items or I miscalculated. I will figure this out quite immediately.