Yeah I've worked on so many systems that dealt with money. Telephone invoicing, business accounting, ticket sales, etc. One of the businesses I worked for did

Yeah I've worked on so many systems that dealt with money. Telephone invoicing, business accounting, ticket sales, etc. One of the businesses I worked for did online invoicing and they initially started off without double ledger accounting. I was employee 30 or so and I kept repeating "we need double ledger accounting" every month or so. Nobody really listened to me (to be fair I was young, but this was after the telephone invoicing job) until the cracks started to form. It took them years to transition to a new system. Do not re-invent accounting with your own terms. International commerce runs on it and it has figured out a lot of the edge cases.