Build a new website with a shopping cart that we can managed once build

We need a website designed and build with a shopping cart. I can have as many 12 pages or drop down.
Homepage, about us page, order page, testimonial page, contact us page, press release page, terms, and service at the bottom, (maybe a picture page and one more)

This is a small business, but then need to order online with or mail in a check

I will send all pictures, wording etc this is done.

The online will sell three different products only but in different quantities, IE order 100, 250, 500, 1000, 2500, 5000 This is the main product

The other two will have 100, 250, 500