Hello! WE have just analysed your requirements and we would like to assure that our specialists will help you with this invoice system creation. It'll be done professionally and in time . ...as our company is a US based, webdesign and development company with a decade of experience in the field and over 600 successfully completed works which vary from simple Online shop Pages and Auction Pages up to complete sophisticated E-Commerce systems and E-Commerce website design services (it also includes LOGO DESIGN AND CORPORATE BRANDING ). Our company uses brand new versions of php, asp, asp.net, mySQL, ms sql, Apache for our projects. If you are interested in our cooperation, please, contast us via PMB so that we dioscuss it. Look forward to working with you, Viaden Inc