The real problem here isn't the formula. It's the friction. You have a year of handwritten logs, a tax deadline, and a spreadsheet that feels like it's fighting you at every turn. That frustration is legitimate, and it's the exact moment most people give up on building a system that actually works for them. We think you should stop trying to force a single, perfect formula to solve everything at once. The path forward is simpler than it looks, and it starts with breaking the problem into two pieces: structuring the weeks, then pulling the totals.
You already did the hardest part. You manually entered week one and week two on Sheet 2. That gives you a foundation. The reason every YouTube tutorial and Copilot suggestion failed you is that your workweek doesn't start on a Monday, and your data spans a partial first week. Most automated formulas assume a clean, calendar-aligned start. Yours doesn't. That's not a mistake, it's reality for a 1099 employee whose first day was a Friday. So instead of fighting that, lean into it. Use a simple `WEEKNUM` function on your date column in Sheet 1, but adjust it with a second parameter so it recognizes your custom week start. Then, on Sheet 2, use `SUMIF` to pull totals from Sheet 1 where the week number matches. No AI assistant needed. No complicated array formulas. Just two functions that have been in spreadsheets for years.
We understand the urge to let an AI tool write the formulas for you. It feels faster. But what you described, a subscription expiring mid-project and leaving you with opaque, error-prone logic, is a cautionary tale. AI can accelerate exploration, but it shouldn't replace your understanding of the underlying structure. Your sheet became a black box. When the black box broke, you had no way to fix it. The real empowerment comes from knowing why `SUMIF` works, not from watching a cursor generate twenty lines of code you can't read.
So here is the concrete next step. Open Sheet 2. In the column where you want weekly totals, write this: `=SUMIF(Sheet1!A:A, ">=" & A2, Sheet1!O:O) - SUMIF(Sheet1!A:A, ">" & B2, Sheet1!O:O)`. That formula says: sum all earnings where the date is on or after the start of the week, minus any earnings after the end of the week. It works with partial weeks. It works with your February 14 start date. It works whether your subscription is active or not. Copy it down for every week row, and your totals will appear. No guesswork. No black box. Just a spreadsheet that does exactly what you tell it to do.