So I’m looking for a tool that can tell me the total cost of things I buy. Like if I buy item A for 1,20€, item B for 5,60€ and item C for 10€, it tells me how much the things I’m buying cost, which would be 16,80€ in this case.
I tried looking it up, but apparently ddg is once again incapable of showing any relevant results.
I think you are looking for an “expense tracker”. There are plenty of those where you can type it in and get overviews of your spendings. I do not know which is better.
If you need it for business purposes, like keeping documentation, scanning receipts, OCR reading and file exports etc. it will cost money.
There are currently no one that does all and everything for free, but “Expensify” might be worth a look.