Right, but the system could convert the value to all caps after you enter it, no?
It could almost be a 2-liner Javascript (gasp!), 1 to import jQuery (more gasps!) and 1 to run all inputs through toUpperCase()...
The bill will be 95K, thanks!
Same as the restaurant bill is not equal+margin to what they spend on food, it's also everything else like rent, salaries + margin.
That is usually what makes cost in government projects explode as they are an utterly wild mix-and-match of code and hardware that is from the earliest era of mainframes 60 years ago to stuff that has been made in the last half year. Alone testing for encoding issues can take weeks... because most testing has to be done and verified manually.