sector15

Hi, I would like to make an online store that sells custom made curtains. This would require the customer to enter the Width and Height of their window, and then would calculate the price accordingly (based on the size). For example: The particular curtain is charged at $50 per square meter. The customer enters width of 1.2m and height of 2.1m Price = 1.5 x 2.1 x 50 = $157.50 1. Is this possible? 2. If yes, how would I go about doing this? Which files do I need to adjust? Thanks a lot.