How to Use the Calculator
Run one normal cleanup route and write down roughly how long it took and how much money you earned. Put those values into the calculator, then add the upgrade cost and your current money. The tool returns the number of runs needed, estimated minutes, how much money you still need before buying, and how much money should remain after the target is purchased.
The estimate is only as accurate as your inputs. If your route is improving quickly, lower your run time after a few runs. If you are testing a new zone, raise the time slightly. If friends are helping, use the money and time from a group run rather than a solo run.
Why This Is Not an Official Formula
Public sources checked for this site do not provide official upgrade formulas, money rates, or cost tables. A custom estimator is still useful because it helps you compare decisions. If an upgrade needs six more runs and another needs two, you can decide whether the bigger goal is worth delaying the smaller one.
FAQ
Short answers for common player questions, based only on public information that can be checked.
Is the calculator official?
No. It is a custom player estimator. Inputs are your own run time, money per run, current money, and target upgrade cost.
Does the calculator use official upgrade formulas?
No exact public upgrade formulas were available, so the calculator does not pretend to know official values.