Is each roll out considered one window or since there are two windows to each opening or two roll outs per opening is that considered two windows?
If you are replacing 2 stacked awning windows with one doublehung, then that is counted as one window. Does that affect your window count?
The "5 homes in the neighborhood deal" is an old tin man gimmick. It is used in advertising as a way to get you to call them, and in a sales pitch to get you to buy.