have you seen traveller tools with it's trade generating tool?
It does what you need, not sure what conversion to spreadsheet would add tbh
travellertoolsdemo.azurewebsites.net
I have seen that trade generating tools...and it's pretty cool, but it's not really what I'm looking for.
What I'm looking for is an operations ledger. Just like what a business in the real world uses.
I've got my Free Trader and I can use your mentioned trade generator to produce revenue.....that's great! I can simply deduct whatever I earn from the outstanding ship mortgage, rinse and repeat.
But it more complicated than that. Docking fees, maintenance, fuel, salaries....all these can add up and I'd like to track those transactions. Now...I know this isn't required to play Traveller. But I'm curious if anyone has a spreadsheet they have already created to capture this style of play, and if so will they share it? I know there are those on the Traveller RPG Discord that engage in this detail orientated running a business type of gaming (and I've reached out asking). People have done it playing EVE Online....even old school AD&D had rules about building a keep, hiring of henchmen, and collecting taxes.