THE GOOF IS A GOOF
In the list of GOOFS it says...
"The sandwich in the fridge is in a clear plastic bag and the bread is obviously commercial pre-sliced. Neither was available in March 1928."
WRONG ! If you look closely on the BD it is a paper based clear sandwich bag not an all plastic one. Sliced bread was introduced in 1928. She was a pretty hip Mom so she would have it.