Design 1 
The main idea behind this design is to have a very simple simplistic layout with big button,big pictures, and and simple flow.
Design 2
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This was focused on making the automation process as simple as possible. The idea was to have to have every item you buy, have the option to buy it on a regular basis.
Design 3
For my extreme design, I decided to focus on an illiterate point of view. So I sketched out an interface made with mostly pictures. I was trying to be as visual as possible, because our interviews showed that the elderly enjoyed having a lot of big images.