How do small sellers (under 100 orders/day) actually track per-ASIN profitability without paying for expensive software?

I’m a developer and I’ve been helping a few small Indian Amazon sellers understand their margins. The problem I keep running into is that the settlement report is a nightmare to parse manually.

For context, a typical settlement report has separate rows for:

– Principal

– Tax withheld

– FBA fees (per unit)

– Referral fees

– Shipping credits and charges

– Promotional rebates

– Liquidation fees

– Disposal fees

– Advertising charges (separate report entirely)

To get true per-ASIN profit, you have to join 3-4 different report types, handle credits and debits correctly, and attribute ad spend manually. This takes hours in Excel.

The expensive tools start at $20-50/month USD and are well worth it at scale — but for sellers doing $2,000-10,000/month GMV, it’s a significant cut.

I’m thinking about building a simpler tool: just upload your flat file settlement report + ad spend report as CSVs, get a clean per-ASIN breakdown of profit, fees, and ad spend. No subscription to a full suite, no API access required.

Three questions:

1. Is this actually a painful problem for you, or have you found a good solution?

2. What’s the #1 thing you wish settlement reports made easier to understand?

3. What would you pay for a simple CSV-upload-only tool that does just this one thing?

Hoping to learn whether this is worth building before I spend months on it.