Lettercase was selected by raising and lowering the massive type basket.
2.
In terms of how much of a CPI-type basket that'd buy.
3.
It provides power for typing as well as power-operated backspace, type basket shift, and power for engaging ( and probably disengaging ) the carriage return clutch.
4.
Unlike other machines of its day, internal data was represented in hexadecimal as opposed to octal, but being a very inexpensive machine it used the physical typewriter keys that correspond to positions 10 to 15 in the type basket for the six non-decimal characters ( as opposed to a-f ) to represent those values, resulting in 0-9 f g j k q w, which was remembered using the phrase " FiberGlass Javelins Kill Quite Well ".