Online Cost Calculator

I am looking to have a cost estimation calculator assembled so that future sales staff and customers and quickly estimate the costs of moving their IT infrastructure into the cloud. Here is a link to a competing calculator that I like: [login to view URL] I've also attached a quick sketch that I assembled that shows how I would like to see it modified. You essentially add a server and then configure what types of resources you would like to have allocated to that server. On my sketch, I've added red letters to reference each component. A. After a server has been added, you can specify how many of this particular configuration you will need. B. A drop down item list (likely to come from a database that can be edited) will provide a list of pre-configured options to chose from. C. Another drop down to select the type of operating system (again pulled from a database that can be manipulated. D. A slide that allows you to either type in or drag the amount of disk space needed. This value will need to be constrained with a min and max possible value. E. A drop down menu the specify a class of storage. Like B, options pulled from a database that can be added/subtracted from. F. A sub-total that will be calculated based on values selected from A, B, C, D and E (each option impacts the total price). G. A drop down option list pulled from a database that will apply a discount based on commitment term. H. Additional discounts that get applied for larger volumes. We currently are expecting about 8 tiers of volume. Discount will be calculated based on sub-totals adding up between a range of values. I. The grand total. Not depicted in the sketch, I would also like to have an option for the user to generate a summary that can be printed and/or emailed. As part of the email process, I would like to have a copy sent to our internal sales email address for reference.