I have a formula I took form another spreadsheet I have but did not create, and am trying to make it work with the current one. The sheet has 3 tabs and is made for estimating purposes, the first tab is labeled as Equipment, then I have 2 different proposal types on the other tabs. The first is not an issue because all I am doing is pulling the total, The itemized quote tab what I am trying to do is as we add equipment to the list with pricing to get it to populate on that tab in the correct places. In the sheet I have, I highlighted the formula cell in yellow in the Itemized tab. Would really appreciate some help on this, It appears to currently only work if the original information and the tab its being copied to both start at B3 which I obviously need to change. I am probably closer to a beginner with this as what I am trying to do is over my head in excel. I have a google doc link to the spreadsheet below.

https://docs.google.com/spreadsheets/d/1X9dPqc34KPQnvmUlUHQKIrMkd_NPlUsy/edit?usp=sharing&ouid=103478358119568815022&rtpof=true&sd=true