Late reply... can you estimate the number of hours per week you put into planning, shopping, cooking, and cleanup? If so, and if you can you assign a $ value to that time, it would be an interesting exercise to compare such _total_ costs (averaged per meal) versus the same calculation using Soylent.

I would suppose (based on doing 50% Soylent for a few months) that for an all-Soylent diet, planning and shopping time goes to zero, "cooking" time to 5 min/day (to shake up one bag in the pitcher), cleanup to near-zero (put glass in the sink). Very possibly the reduction in time, valued in dollars, makes Soylent cheaper.