The $9 per month per window refers to our arrangement with Syncrony for a .0125 monthly payment on your project financing. It is an estimate based on a 10% deposit on an average window with standard installation. Here is an example – Based on an average sized window at a product and labor cost of $800 with 10% down using Syncrony Finance with a monthly payment percentage of .0125. $800 – $80 = $720 x .0125 = $9 per window. For more information please call 952-935-9669 and set up an appointment with one of our consultants.