Once you have it, what to do with it.
The workbook is only half the job; the method is the other half. Four steps, in order, and the order matters.
Fix one measurement basis and write it at the top. Carpet, built-up or shutter area — it matters less which than that every quotation uses the same one. The same rate applied to built-up rather than carpet area turns a ₹15 lakh expectation on a 1,500 sq ft flat into ₹22 to ₹25 lakh, and nothing you compare afterwards will mean anything if this is left loose.
Put every quote on the same side of GST before comparing anything. An inclusive and an exclusive number differ by 18% and look identical in a message.
Copy each contractor's lines into the format. This is where the sheet earns its keep: anything a firm cannot fill in is not a detail they forgot, it is a decision they have left open, and open decisions get closed on site at a price you did not agree.
Add every excluded line back to the cheaper quote before you call it cheaper. Then compare payment terms, completion period and defect liability, which are not in the number at all.
The long version of that method, with a worked example of two quotations lakhs apart that turn out to be the same price, is in how to compare interior quotes line by line. If you want to understand a BOQ line rather than just fill one in, start with how to read an interior BOQ. And if you have not asked anyone for a quotation yet, the seven things to settle first will save you a round trip.