TIFU by not reading a quote thoroughly and almost costing myself $4,000

We decided we needed two egress windows installed. We met with several vendors, including one that came highly recommended. The recommended vendor and I spent a solid 45 minutes going over everything in detail. A few days later, the quote came in, and it was the cheapest by a long shot. But here's where I f**ked up.

I saw the quote was only for one window. Furious that they could make such a basic mistake after a lengthy consultation, I refused to use them and spent the next few weeks complaining to anyone who would listen about their incompetence (without naming names, of course). We decided to go with another company, which was almost $4,000 more expensive.

Today, before we signed the expensive contract, I decided to look at the first quote again to see what the window cover would cost. As I read more closely, I realized they had a checkbox to add the second window, and they gave us a $1,000 discount for doing both at the same time. Not only had I completely misread the quote, but I spent weeks being mad at a company for a mistake that was entirely my own.

So now, I have to go back to the original company and hope we didn't miss our chance to get on their schedule before the ground freezes. My anger was completely misplaced, and my stubbornness almost cost me a ton of money.

TL;DR: I was so mad at a company for supposedly only quoting me one egress window that I chose a different vendor. Turns out I didn't read the quote properly, and my weeks of being angry were my own stupid fault. Now I might not get the windows installed before winter because of my mistake.