It sounds about right, though IDK about the $$$ part.
The only "error"/deviation I ever saw, if I remember correctly, was when the formula for counting cells with content started to count "" [nothing/empty] like " " and "0", erroneously as 1.
Old formulae (usually) continue working. Some time back, I had to verify that the calculations in a spreadsheet from 1995 were still correct. They were (b/c of now posterior human intervention 😉.)
#VisualBasic,...