1981. Bought biggest Apple ][ with biggest screen and 2 floppy drives and printer. And visicalc - because it was hard to tell what visicalc really did from published articles but easy to understand with it on the system. $5000. Yikes. This Apple store (an independent) was run on an Apple ][ and it took 30-40 minutes to get the transaction entered and the bill calculated and printed. Added C compiler and wrote a simple nroff and wrote my own Fed/State tax program each year to do the calculations, 1881-86.