Most small businesses find out months later, if ever. Fill in what you know and find out now.
The number on the invoice. If you charged sales tax, put the rate in and I'll take it back out — that money was never yours.
Wages are not what labor costs you. Payroll taxes, workers' comp and insurance add roughly 15–30% on top, depending on your trade and state.
What actually left your account for this job.
Rent, insurance, the truck payment, your phone — the bills that show up whether you work or not. If you don't know your number, 10–20% of revenue is a normal range for a small shop.
No code, no computer background. If you can send an email, you can do this. On the 10th I'm teaching a room of small business owners how to build tools like this one for their own work — plus getting AI to sound like you instead of like everybody, and getting found when a customer asks AI who to call.