My dad was an accountant and although he passed back in 2006, I still have a big box of all his papers. He and my mum divorced in the early 80's and he had to bring two children up on his own and this looks very familiar. He was some kind of accounting sadist!
This sort of thing sings pure dedication to me 😂
My dad was a data clerk at this point, that's what it says on my birth certificate - his dad had been a "Sales Ledger Clerk" all through his career - it always tickled me that my grandad felt it important to make the distinction between working on the sales ledger rather than purchasing :)
Anyway it was doing this job and feeding the mainframe that got my dad interested in computing - he left this job and became a trainee at the Austin Motor Company where he learned the basics of programming, which then led to him working as a programmer, writing accounting software, for the next twenty years. I don't know about your dad, but mine found some comfort in being able to express the world in numbers, giving him a bit of control over the chaos that was elswhere!