A computer with a spreadsheet was a HUGE game changer.
In '85 most companies did books by hand and adding machine. Records were kept in ledgers and in filing cabinets. People used to hire CPA’s to come in and do the balancing even in small convenience stores. Given labor wasn’t what it is now, but a machine like that could pay for itself pretty quickly.
I worked a fast food job in the 90’s They had an ancient box running 1-2-3. Every night, the MOD would have to sit down with a paper sheet and an adding machine to generate this table, then enter all the transformed data into Lotus. They literally sat back there for hours working over the data. I asked, why don’t you just change the sheet to do all the calculations? Can’t, the franchise owner wants it all done by hand. They were literally taking a row of numbers, doing some math on it, then doing more math on each column to come up with a final row of like 7 numbers.
I had them show me what they were doing and wrote a program on my TI calculator to generate the table from the input numbers. Told them if they wanted the program just to get the same calculator and I’d transfer it over.