You're correct. We just want to see the total bottom line the customer is interested in for each line item. I took a couple days to review some of the webinars as it's been a while since I've had to do any customization. I understand what you are proposing as the solution, but it is out of my league in terms of what I can customize on my own.
One thing I should probably mention is that for this screen, we don't need anything to revert back to QB accurately. Since Estimates aren't important for us in terms of bookkeeping, we do them strictly in Method just so we can generate a PDF for our customers.
So I thought the simplest solution would be to create custom fields for salesprice and Total Amount (salesprice x quantity). It doesn't matter to us if these don't pull into QB. My two problems I'm facing when trying to do it this way.
1. I created a new custom salesprice field that isn't a linked field like you recommended a few posts up. But I can't get the Actions in the grid correct so that it's pulling the number automatically from the Item table. I'm replicating the Actions from the default InvoiceLine grid to try to recreate the same actions that happen on that grid, but I'm sure I'm missing something.
2. I'm stuck on how to do basic math actions so that I can get a Total Amount (salesprice x quantity) column to work. I looked over the webinars and can't find one that deals with Basic Math in a grid situation where we're multiplying one column by another. If it exists, can you point me to that webinar?